Didnt get fotus armour pack ingame??

Hello, few days ago i bought a New xbox one 1tb halo 5 edition, i downloaded the game and then i was trying to use the code that was with it, to get a ingame armour, so i needed to type it in the STORE on xbox live, i did so, and it said it got accepted, but when i went ingame i havent got any…
the armour code is for fotus armour in halo 5… so please help me to get it… bit sad, bought that one cus of the special armour code… My Gamer tag is: O Ole O