Trouble with redeeming armor

Hey guys… I ordered a copy of Halo 4 from Amazon and have just gotten it in the mail, but I can’t seem to figure out how to redeem my web armor.

I didn’t get any download codes in the package or in any of the confirmation emails from Amazon and I wasn’t presented with any options to download anything when I loaded the game.

Has anybody else been able to claim their armor and if so, how’d you do it?

Please let me know… Thanks!