the ban is correct and PERMANENT. if it was falsely applied it would have been removed years ago

el problema es que hace años que estoy bloqueado e intentado quitarmelo pero no puedo

No, the problem is, you haven't bothered to read anything...

https://steamhost.cn/steamcommunity_com/discussions/forum/9/882959527688934488/

all VAC bans come from the detection of a known cheat, whether it is used on the account itself or some sort of sharing has occurred (account, library or phone number).

Users are responsible for the security of the account and all that happens on it