campign progress lost

After playing for 4 hrs last night, today to my surprise all my progress is lost in mission 9. It happened to me a couple of times. Can i recover my game saves please. Any help is appreciated. I know that game saves are automatically stored in the cloud after i quit the game. I also deleted the reserved space for this game (256mb) .

sorry, what i meant to say is that my game saves in mission 9 are lost. mission progress is okay.

That is exactly when my progress reset!