In that case, you need to reinstall CS:S. Are you Steam or non Steam?

EDIT : If you think I am being cruel by not unbanning you straight away, it's more the fact that if I unban you and you try and go on the servers again, SMAC could just ban you again if your client side cvars are conflicting with the server side cvars again. That is why you need to either reinstall CS:S if you are on Steam, or replace your config files with default ones (I think I have the default ones that you can have).