There are only users in the forums. No one that has access to answer your account questions. For that you would need to create a Support ticket.

However, as a user, it appears that your account is compromised. Take the steps to re-secure it:
1. Scan for malware https://www.malwarebytes.com/
2. Deauthorize all other devices https://steamhost.cn/twofactor/manage
3. Change passwords from a clean computer
4. Generate new backup codes for your Mobile App https://steamhost.cn/twofactor/manage
5. Revoke the API key https://steamhost.cn/steamcommunity_com/dev/apikey (there should be nothing in the APIKEY)

Originally posted by Ajj:

unauthorized activity

Because you successfully brought someone else into your account. And "unauthorized"? You did everything to make sure it was indeed authorized. That doesn't "just happen".

You gave them the velvet rope treatment.

You are alleging a crime has been committed, and as such you should go to law enforcement. At the end of the day it'll be up to them to confirm your story, and up to them to compel the company to cooperate. With any investigation they are conducting. Your word alone wont suffice. Go to the police.

Originally posted by Ajj:

I recently discovered unauthorized activity on my Steam account. My Steam wallet balance was used by unknown without my awareness to purchase Dota 2 item. I didn't make the purchase. I also don't even have the game. Please help me investigate this case and restore the lost funds.

Secure your account (see post #1).

Your wallet balance is gone.

Originally posted by Community Market FAQ:

How can I reverse or cancel a completed Community Market transaction and/or get a refund?

All purchases are final – you will not have any right to a refund or a reversal of any Community Market transaction once it is completed.

Originally posted by Dodece:

Go to the police.

I'm pretty sure it will go like this:

https://m.youtube.com/watch?v=Y3i6Jb7K4O4

Originally posted by Ajj:

I recently discovered unauthorized activity on my Steam account. My Steam wallet balance was used by unknown without my awareness to purchase Dota 2 item. I didn't make the purchase. I also don't even have the game. Please help me investigate this case and restore the lost funds.

Why I have been charged for the item I don't even know?

Details
- Item: Inscribed Bracer of the Eleven Curses
- Date: Thu Aug 21 08:19:32 2025

Do you still have the item or is it gone too?

The only way for someone besides you to access the account is either YOU gave away the login info (either from use of third party scam trade sites or a via a phishing trick) or you have malware on your system that sends data back to a bad actor and your login info was in that data.

Originally posted by Lilim:

Originally posted by Ajj:

I recently discovered unauthorized activity on my Steam account. My Steam wallet balance was used by unknown without my awareness to purchase Dota 2 item. I didn't make the purchase. I also don't even have the game. Please help me investigate this case and restore the lost funds.

Secure your account (see post #1).

Your wallet balance is gone.

Originally posted by Community Market FAQ:

How can I reverse or cancel a completed Community Market transaction and/or get a refund?

All purchases are final – you will not have any right to a refund or a reversal of any Community Market transaction once it is completed.

Originally posted by Dodece:

Go to the police.

I'm pretty sure it will go like this:

https://m.youtube.com/watch?v=Y3i6Jb7K4O4

Unfortunately it is literally their only option. Valve isn't going to provide that information, and they aren't going to seize the item, or refund the money into their wallet. They just can't take a users word for it, because the user can be lying, and they can be running a scam.

Originally posted by Dodece:

You are alleging a crime has been committed, and as such you should go to law enforcement. At the end of the day it'll be up to them to confirm your story, and up to them to compel the company to cooperate. With any investigation they are conducting. Your word alone wont suffice. Go to the police.

There would first need to be a crime committed as they did not directly state one was committed, only that there was unauthorized purchases. Op could have been on a public pc (ie internet cafe) and did not log out of their account, someone else used the pc after thinking those are free games to play and went at it. There is however the matter of the steam ssa which op agreed to keep their account secure something which they seemed to fail to do so.

Police would research Steam stolen items being lead to
https://steamhost.cn/help_steampowered_com/en/faqs/view/3BDC-9523-C02B-7075

click items deleted leads to
https://steamhost.cn/help_steampowered_com/en/faqs/view/6E56-1261-A719-8D4F

and then item restoration policy
https://steamhost.cn/help_steampowered_com/en/faqs/view/3B6E-B322-2400-8D24

Steam Support does not restore items that have left accounts for any reason, including trades, market transactions, deletions, or gifting.

It is your responsibility to secure your Steam account. To quickly make trades or sales on the Market, your account must be protected by a Steam Guard Mobile Authenticator. This ensures that only you are able to remove items from your account. If you can’t enable an Authenticator, Steam will hold the trade or Market sell listing for a period of 15 days so that you’ll have enough time to discover and cancel pending transactions if your account was compromised.

Steam Support does not restore lost items. Items often exchange hands multiple times before a restoration request and this means they cannot be restored without duplicating them or removing them from another innocent user’s inventory. Duplicating items has a negative impact on everyone who trades or uses the Market by lowering the value of items.

Valve does not restore the items/funds so that is out of the question meaning the cops would need to find out who accessed your account and how. Considering vpns hide/mask ip they cannot go based on that, leading them to a dead-end essentially. Their only bet would then be to recall the ways their account was access, if it is an internet cafe then check if they can review cameras, if it was their personal computer then malware may have been involved or simply them logging into a phishing site.

Originally posted by The Living Tribunal:

Originally posted by Dodece:

You are alleging a crime has been committed, and as such you should go to law enforcement. At the end of the day it'll be up to them to confirm your story, and up to them to compel the company to cooperate. With any investigation they are conducting. Your word alone wont suffice. Go to the police.

There would first need to be a crime committed as they did not directly state one was committed, only that there was unauthorized purchases. Op could have been on a public pc (ie internet cafe) and did not log out of their account, someone else used the pc after thinking those are free games to play and went at it. There is however the matter of the steam ssa which op agreed to keep their account secure something which they seemed to fail to do so.

Police would research Steam stolen items being lead to
https://steamhost.cn/help_steampowered_com/en/faqs/view/3BDC-9523-C02B-7075

click items deleted leads to
https://steamhost.cn/help_steampowered_com/en/faqs/view/6E56-1261-A719-8D4F

and then item restoration policy
https://steamhost.cn/help_steampowered_com/en/faqs/view/3B6E-B322-2400-8D24

Steam Support does not restore items that have left accounts for any reason, including trades, market transactions, deletions, or gifting.

It is your responsibility to secure your Steam account. To quickly make trades or sales on the Market, your account must be protected by a Steam Guard Mobile Authenticator. This ensures that only you are able to remove items from your account. If you can’t enable an Authenticator, Steam will hold the trade or Market sell listing for a period of 15 days so that you’ll have enough time to discover and cancel pending transactions if your account was compromised.

Steam Support does not restore lost items. Items often exchange hands multiple times before a restoration request and this means they cannot be restored without duplicating them or removing them from another innocent user’s inventory. Duplicating items has a negative impact on everyone who trades or uses the Market by lowering the value of items.

Valve does not restore the items/funds so that is out of the question meaning the cops would need to find out who accessed your account and how. Considering vpns hide/mask ip they cannot go based on that, leading them to a dead-end essentially. Their only bet would then be to recall the ways their account was access, if it is an internet cafe then check if they can review cameras, if it was their personal computer then malware may have been involved or simply them logging into a phishing site.

The overwhelming majority of criminals are idiots, and commit their crimes for just two reasons. They either think there is no way they'll get caught, or they don't care if they will end up caught. Often in spite of having been caught multiple times, and having spent years of their life in jail.

It's one of those weird quirks of human psychology. Idiots think they are smarter then they are, and the intelligent recognize their own ignorance. Meaning the latter usually wont get involved in crime, and the latter will keep doing it until their luck runs out. Which is usually fairly soon.

For every clever criminal there are ninety nine imitators. Who undo themselves by taking dumb risks, not taking the adequate precautions, or falling into familiar predictable patterns. Most of these guys aren't Daniel Ocean with his crew.