I'm afraid we cannot assist with account bans on the forums, though we can certainly get you pointed in the direction of those who can.
As these are public boards, we are unable to discuss or change any account details here. If you believe a ban was placed on the account incorrectly, please create an appeal here and our Terms of Service team will be able to review that situation for you.
The ToS team will reach out via email once their investigation is complete, so please keep an eye on your email for that to arrive.
If this has happened after you've been away for a while or you have any reason to believe someone else may have gained access to the account, I'd also highly recommend checking through these security steps to make sure your account is secure.