BattlEye bans are permanent and any support requests for an appeal are only looked at if there is proof that you did not hack. They are not controlled by the game developer, so don’t post about them here.
VAC Bans are permanent and non-negotiable. Don’t post about them anywhere. The game developer cannot help you, and Steam Support cannot help you.
Server bans are controlled by the server’s owner. Don’t post about them here. Contact the server’s administrative team, or the server owner.