REDEEM CODE NOT ABLE

I am not able to redeem the code for Halo 5. I keep getting the following error;
Something went wrong Give it another try. If this happens again, let us know by entering the code below at Xbox Support so we can investigate.
Purchase-Entitlement-1025 4adfab90-3307-4bd1-82ed-f67378606d3d 2015/12/29 - 04:43:15 UTC

I contacted Xbox support and they verified that my account is correct and that my code is still valid. Xbox customer service did everything they could but couldn’t figure out the problem. Customer service then provided this website and said to contact you direct for support since its a Halo issue not an Xbox issue. Please provide some support or guidance.

comment faire pour recuper un code pour jouer a halo 5 sur xbox one svp