We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
Then it sounds as though the Far Cry team have banned you from their MP, which means you will need to take it up with them via their own forums as MS are not responsible for individual game suspensions
Don't worry about it because it's a common glitch in Far Cry 3 that should be fixed in a future patch and I would recommend you going back to the main menu when you get this message because it sometimes helps.