If you don't know why this happened, then it's probably something that can be discussed. Please email email@example.com with a nice message asking why.
If you do know what happened, but you didn't mean to do it, email support@ nicely asking for help with the ban.
If you know what happened and you disagree with reason for ban, email support to discuss it with me.
If you know what happened and you did it intentionally, please go and play another game, but let me know first so I can ban you permanently.
Speedy, courteous correspondence is received well. Repeated instances are judged harshly. When exploring things on the edge of the rules and in doubt, please email before acting on the exploration.