Weres my zombies gone?

yeh so apparently i havent completely the campaign so cant play the nazi zombie mode?!
even though i have, and the last time i touched the game was turning it off after a game offline with my mate.
i haven't touched my saved data folder or anything. just wiped it clean, although i still think i have the trophies. anyone know what the problem is?

its when i go Main Menu>Co-op>split-screen>game mode and then Nazi Zombie's is locked.

I have seen a few people have this problem it was after they patched it so everyone could play it seems to have wiped some players save data.

I don't know if anyone has fixed it though.

I have started a nazi zombie mode by myself

yea

my zombie co op is locked to

ima hav to finish the crap campaign again

_{Didn't work for me.}