A support case was created for you and you should be contacted shortly by a Customer Support Representative, if you haven't been already. You can view and update your case at the Activision Support website. After logging in, go to "My Support" then "My Cases".
Hi. You may want to try going to Game Data Utility and delete the second file of Black Ops 2 there which name has an "Install" name on it. Then, reboot your console and try to play the game to check if there are any changes.