Didn't receive my halo-4 specializations code

I didn’t receive my halo-4 specializations code by e-mail or on my xbox message, I pre ordered this game and got it on game day release, anyone that got the game from the release date until the 20 of november should of got the codes by one of the messageing ways i just posted but i didn’t receive mine. my gamer tage is leonidasblade82, dob is 01/13/1982 and i live in the U.S.A those are what i was told they need to know on some forum page for it but i couldn’t find the forum for it, if you didn’t get the codes.