Hello I was trying to access multiplayer yesterday and was greeted with a ban notice. I have no offensive designs or tune names. Please help me.
Sounds like a Turn 10 employee caught you with a violation of the Xbox Live Code of Conduct. You will need to send an email to them at firstname.lastname@example.org, including any other gamertags which have played on your console.
Neither bans nor the enforcement of the regulations are discussed on these forums. Have patience waiting for a response, it takes time to investigate.