What you can do is try to open a ban appeal, which should appear as an option when you try to create a Support ticket. Do not use any special characters at all, just plain text, when writing your appeal - that's a security measure because special characters can be exploited. Also, be polite and courteous - remember you are appealing for the ban to be lifted, not demanding anything. Ban appeals have low priority and evidence leading to the ban will have to be re-checked, so it might be a few days before you get a reply - which might also be your appeal being denied.