It's a game ban, not a VAC ban, and it has nothing to do with this forum.

Since Valve is the developer, the ban cannot be lifted.

It's permanent.
https://psteamhelp.yuanyoumao.com/en/faqs/view/4E54-0B96-D0A4-1557

I was not using my account when it was game banned. Can the ban be removed?
No. Regardless of who was using the account at the time the ban was issued, game bans are permanent and are not removed.

引用自 fog：

I haven't played CS2 for a long time, and when I log in today, I get a VAC ban. I'm worried that my account has been hacked, so please remove the ban. I'll deal with it and change my password.

1 game ban on record | Info
0 day(s) since last ban

bans are delayed. Irrelevant who used the account, and there are a few reasons for a gameban. Also its permanent

Ban Removal was denied the moment after it was awarded

Nobody will remove any bans by posting here, that's not how it works.

It works like this:

1. You get banned
2. The ban is permanent
3. You create a new account and move on

Ez.