Do all the following steps to properly secure your account.

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

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

Change passwords from a clean computer

Revoke the API key https://steamhost.cn/steamcommunity_com/dev/apikey

Generate new backup codes

Nobody is hacking anyone's Steam account. At some point in the past you either used your login on a 3rd party site, or logged into Steam through a phishing page masquerading as the proper login page. The 2FA through either the Steam App or Email means that even with your login and password, there's almost no chance they will be able to guess the code in the short time that it's usable.

"Hello, my belongings were stolen. Is there any way to get them back? Do you know how? Please help me."

Originally posted by Chara Dreemurr:

a friend told me that I was hacked again by a Turkish guy on Steam

Do your friend work for some intelligence agency? How would even a normal person on the internet know what someone is doing over there in Turkey?

No

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1126288560

Asking for advice on securing the account. Receives a lecture about pointless input in the statement. WP!

Originally posted by The Alice One:

I've already changed my password, but will that be enough?

That's not enough. Follow all the steps in post #1.

Originally posted by The Alice One:

...but I've been getting hacked a lot...

You have to find out how someone keeps gaining access to your account.

• Have you been asked to vote for a team/tournament/pixel art?
  
• Have you been asked to register for a tournament?
  
• Have you used any third-party site for gambling, trading or matchmaking?
  
• Have you logged in on a public device?
  
• Have you entered any giveaways/giveaway groups?
  
• Have you tried to claim any "free 50$ gift cards"?
  
• Have you been contacted by someone (through chat or Discord) about an issue with your account?
  
• Have you been "accidentally reported"?
  
• Have you been invited to a "playtest"?
  
• Does someone else use your PC or your account?
  
• Do you use any browser extensions (like Steam Inventory Helper or CSFloat Market Checker)?

Is it just your Steam account that is being "hacked"?

Can I recover my hacked knife skin? They hacked me with API.

Originally posted by G U K A:

Can I recover my hacked knife skin? They hacked me with API.

No Steam will not replace/return items once they have left your account regardless if it was you or a hijacker who did it.