What console are you using and what troubleshooting steps have you tried so far?
Well it's ps3 and i disconnected it and left it there for a while and cleaned the disk and it still freezes but when i pick zombies it doesn't
How about trying the disc on another console and check if the same issue happens?
That's a good idea but when somebody invites me it works, but thanks ima try that, you got a ps3?
I had a PS3 but it's already the the possession of my cousin since I already bought a PS4.
You also can try to delete your Game Data Utility.
I hope it does the magic.
If not, here's a link for some other steps that you can try: Activision Support
Best of luck!