Jake Rosenthal

I just beat Halo 4 on legendary solo while offline since my internet was down for a bit and it shows i have the achievements, i invested a solid 15 hours into it, beating it solo and my stupid game says iv'e only beaten three missions on legendary after logging back onto Xbox Live, and it wont give me my Mark IV armour! Such a bummer, and like thats why I did it all in the first place, anyone know how to fix this? let me know! Much appreciation, Anemic Avenger