halo 3 help not sure what to do?

[? silver?]

ok well i got got my katonna and shortly after i got the annul achievement and then my katona disappeared and well its bin gone for like 2 days what do you guys think i should do
ya i have over 1000 gamer score in halo and i could see it i played games with it on be for i lost it

 

[Ark]

you can't select it in the appearence? how much halo 3 gamer score do you have? you need 1000