Ok well I have done this a few times and it has a 80% success rate.
-Log into your ban account your ban xbox.
-Transfer profile to USB (it must be over 50GB or it won't work.)
-Go to Taco Bell and order 5 Soft tacos, and 3 hard shell tacos.
-Bring the tacos to the closest adult world and bride the guy working to trade you and big green dildo.
-Now carve a hole in to the bottom of the dildo so you can fit the USB into.
-Put USB into the dildo.
-Send this green dildo to Bill Gates or Miley Cryus, leave a note in the box asking to put this in and out of your ass 5 and 1/2 times.
-Their anuses are told to hold magical powers and their ass juice will leak into the USB.
-Once in the USB wait 8 business days.
-After waiting throw it out, you won't ever get unbanned.