How to fix scratched disc?

So, this morning when I opened the disk tray of my Xbox 360, I found my GH3 copy like this. (1st pic). Now it refuses to read; showing up as a "multi media disc" or "unrecognized disc" then when it does take the game and reads it, it'll just say that it wasn't readable. The game does have a few scratches, however they're very minor and have been on the disc for years beforehand anyways. I'm unsure of what to do. If someone could help me out that would be great. (Yes I've tried using a soft cloth to clean the disc.)