Armours n everything gone!! how do i get them back???

Can anyone help me, somehow, my armour, the maps i got, all have gone, i have to start from the beginning?? Im still colonel grade 3, but everything else just disappeared!! Can anyone tell me why?? and how the heck can i get it back???

Nohin for you buddy in other words, your boned.

Shut off your Xbox. Wait 5 minutes. Turn your Xbox back on.