Twilight of the republic problem

Hi everyone!
So while I was battling Darth Maul on my ps3, the game froze. I turned my console off and on and when I came back to the play set I was still on Naboo, but couldn't battle Darth Maul, select missions, travel to other planets and all my character coins were gone. Does anybody know what I can do about this or how to fix it?
Thanks in advance

Did you try doing something like going to the hub, or a seperate toy box, and then returning to twilight?