Xbox suspension?

I would be suspended on xbox because of my brother i don't know what that is or how i can undo maybe someone help me?

Xbox suspension can't be undone. Not even regular Xbox Live Support can help. Only the Xbox Live Enforcement Team is able to do this, but you can't contact them. If it's your first suspension, it usually takes over 24 hours. If this is your second, third or you have already received too many suspensions, you can be banned for life.