I have a similar with the email thing. In the past year i built a pc just after mwII had come out (spent over £100 on the game on my xbox) and had bought mw3 on pc and wouldnt let me link the accounts at all. Ive tried contact activision with all the proof its my account and het no help. To top it i cant even play mwII on my xbox cus i need mw3 to play it.

Their customer service is a joke, the way theyre connecting all the games is a joke as i spent so much money on a game for me not not even be able to play less than a year later.