I got banned from the auction house a de i dont know why

I got banned from the auction house a de i dont know why can u help me plz too get un banned the auction house is my life ;( help me plz

Apologies for your frustration, however you should contact Turn 10 at forzafb@microsoft.com

Bans or enforcement of Xbox LIVE’s Terms of Use and Code of Conduct are not discussed on the forums.