u/longer_pi

I've been playing mwii for years now (multiplayer, campaign, the whole lot) and randomly one day it says I don't own it when I've already bought the game. So I can't play any mode except for DMZ. I go to Xbox support and it tells me to power cycle my console. I did that and now I cant even play dmz bc the game freezes on the titlescreen when I press A to play. Any advice or similar issues like this?