Your game ban is permanent.

Skin changers are a bannable offense, so you received what you asked for.

About your game ban: https://help.steampowered.com/en/faqs/view/4E54-0B96-D0A4-1557

Game bans for any VALVe game are permanent.

Originally posted by .:

I never wanted to use any illegal additions again.

So the ban worked! good job ban system.
Now of course the ban can not be removed, because you would just say "aah back to cheating if they'll just remove the ban" so that's permanent.
but! good news, on your next account if you refrain from cheating you will not be banned again. (although you can still be banned by being a horrible person, so be careful)

FAFO.

Skin changers would cause a VAC ban instead. Do your best at lying.

Game bans are delayed too.

Originally posted by .:

I never wanted to use any illegal additions again.

great.

the ban is permanent.

Originally posted by .:

I was cheating (skin changer), but about a month ago and only for a total of 1 hour in deathmatch matches. I stopped doing it and bought real skins myself, but I got banned after I never wanted to use any illegal additions again.

good. system works as intended. ban is permanent