My stuff is gone

I bought the halo 5 halo bundle with the required packs and custom armor I in taller the game and played for about a week and as I log into my game all my requisition packs I have received and downloaded are gone also all my requisition points and my rank went from level 3 to 1 I can no longer access any of my requisition pack or the req store I have lost all my custom legendary armor and skins and all my OnLine information and stats I called xbox support they have done everything they can now I’m reaching out to you not to sure how to get my stuff back and not to sure how to regain access to the requisition store