Help for forza motorsport 4

Hello I just replay my forza motorsport 4 and I just saw a message from you on the auction house to say that I would not have access to the servers turn 10 because of cheating while I never cheat in the game since I played so I do not understand your message how I can solve the problem
Thank you[

You need to send an email to Turn 10 at forzafb@microsoft.com. Include any gamertags which have played on your Xbox 360.

Have patience waiting for the response, it takes time to investigate before answering.