Please help this is troublesome

Ok so I have a very odd, and probably unbelieveable,but bothersome problem, so I bought the Halo Limited Edition and the Halo 4 xbox 360 and I went to pick it up from gamestop and what happened was in the case of the standard edition (which was supposed to have the card with the fotus armor code, the fotus emblem code, and the fotus avatar outfit) with the xbox there was the card that was supposed to be with the limited edition copy (the one that has the recruit armor cryotube avatar prop etc) and in my limited edition copy of the game there was nothing in the case. So basically I bought the Halo 4 console looking forward to using my fotus armor to be like “woo bought the halo 4 xbox” and I have nothing to show for it due to either packaging issues or fowl play behind the scenes (xbox employee taking the code etc). I’d really like to get my fotus armor and use my fotus emblem. Please tell me how to go about fixing this because Gamestop said it’s out of their hands and I can’t get through on the phones to Microsoft.