Need help with a situation on Halo: Reach

I had Halo: Reach ever since it came out and when I bought it, the code for the spartan recon helmet came with it and I redeemed the code the day I bought it and i got the recon helmet. Now while I was going through my armory, my spartan recon helmet just disappeared out of no where. Can someone please help me? I don’t know who I should go to for help on this situation.

Go to your Xbox dashboard and go look at your download history. You should be able to redownload it from there.

what if its not under my download history? i still have the code and everything too