There is no compensation for your own wrongdoing.
All you can do is report and block the account, move on. Let it be a lesson for the next time.

this is not steam support

and you have scame sites in your name history then we know that you have been using your steam login on third party sites so this is on you not steam

https://steamhost.cn/help_steampowered_com/en/faqs/view/3B6E-B322-2400-8D24

https://steamhost.cn/help_steampowered_com/en/faqs/view/3BDC-9523-C02B-7075

read this you not getting your stuff back

You're not getting anything back. Statistically speaking, once you voluntarily enable the theft process, the probability of recovery approaches zero.

You served your own misfortune on a platter, didn't you?
Yes. Yes, you did.

Accounts are phished not hacked.

You gave away all your account details.

The account name, the password and the KEY to the door, the Steam Guard Mobile code giving them access to the account.

How? by either logging into a known scam site or any off steam item sell sites, fake steam log-in websites, or by tailored malware on your PC, the vote for my team scam, you have a pending ban scam on Discord, free knife click the link etc.

How does Steam (a program) know it is not you when all the account details are correct? It doesn't, therefore any action taken on your account is seen as you doing said actions.

The alternative is not plausible:

1) Someone would have to "GUESS" your account name from "millions of possible combinations".

2) Next they would have to "GUESS" your password from "millions of possible combinations" and then match it to your account name with "millions of possible combinations".

3) And finally they would have to "GUESS" the Steam Guard Mobile code "which changes every 30 seconds" to match both your account name and password to then have access your account.

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Your account was phished / hijacked. Follow steps 1- 8 to secure your account:

1. Scan for malware https://www.malwarebytes.com/

2. Check that the email and phone number on the Steam account are still yours.

3. Deauthorize all other devices https://steamhost.cn/twofactor/manage

4. Change passwords from a trusted/clean device.

5. Generate new backup codes for your Mobile App https://steamhost.cn/twofactor/manage

6. Revoke the API key https://steamhost.cn/steamcommunity_com/dev/apikey (there should be nothing in the APIKEY)

7. Make sure your steam recovery email account is secure and still accessible.

8. Do a PW reset to recover any steam points spent in last 14 days.

Steam will NOT return lost funds or Items.

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Because you were phished on your computer. They grabbed the session token from that 30 second 2fa code, along with your login info. that is the only way. with all 3 parts of the key, they could use that at any time to log in as you, since they had the 2fa session token code, steam thinks it is you.

The only way to get all 3 parts of the key is from your computer, you were phished.

Interesting name history OP, I really wonder how you got "hacked"...

Originally posted by Matheusl:

It's not just a support issue — it’s a trust issue. I’ve invested time and money on this platform, and losing everything without any protection is extremely frustrating.

And once again i ask
why third-party trading sites? Why not stick to the official market right here? What exactly was the reason to trade there and not here?
Was it an ad? Was it the prices? Was it group pressure? Was it to cash out?
Help us understand the motivation that led to this outcome.

Originally posted by Matheusl:

it’s a trust issue.

No, it isn't.

Originally posted by Matheusl:

I’ve invested time and money on this platform, and losing everything without any protection is extremely frustrating.

If it all was that important, you'd have done a better job of keeping your account secure.

Be glad it were only skins I mean with that kind of control they could easily have you vac or game banned I mean from stealing to full control is not that much of a leap