You aren't the only one who got banned for no reason... I was banned for using the black ops 1 zombies code for the classic maps I put it in once and the graphics were all messed up hard to explain it was chrome like so I deleted it and put the code I again and guess what? I was banned for too many redemption code entry's or something like that I had tons of games and dlc including $200 in rock band tracks It sucks I know but then you find out there's nothing you can do except start over...
one more reason to hate these assholes you get banned for entering too many fucking codes too many times fuck mircosoft i hope it goes downhill hell i would love to see sega take over these assholes... but it's not going happen...