Your Game ban has nothing to do with VAC or this forum.

Read: https://psteamhelp.yuanyoumao.com/en/faqs/view/46DB-4CEC-F7E9-49E5

The translation says you want to complain about your username being banned, but I suspect you simply mean your game ban in CS2.

Read the FAQ for more information:
https://psteamhelp.yuanyoumao.com/en/faqs/view/4E54-0B96-D0A4-1557

引用自 joaomix2012：

meu usuario foi banido do CS2 sendo que eu nunca joguei esse game, baixei pela primeira vez no meu pc novo! preciso que a steam arrume imediatamente

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

so you only noticed your gameban after 222 days. Ban for CS2 is permanent

Create a new account and move on, yours isn't worth anything anyway.

After 222 days, the ban is permanent, no matter if it's for a VALVe game or other publishers.

You had enough time to "notice" your ban.