Did you buy it new or used? Can you not connect on just 1 account or multiple accounts?
Did this solve your problem?
Sorry this didn't help.
Great! Thanks for marking this as the answer.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.
How satisfied are you with this response?
Thanks for your feedback.
If your xbox have been banned, there has been a serious violation.
Microsoft do not give any information regarding suspensions.
Ways to get banned:
Hey there Sharpy!
If you follow
this link! The Xbox LIVE Policy and
Enforcement team are able to give you an answer to your question.
More about: Xbox LIVE Policies on Console Suspensions