I find the to be completely annoying. I purchased this game brand new. I could care less if the Chains of Olympus and Ghost of Sparta were downloadable, but the fact that the DLC code I was given in a brand new game didn't work is what pisses me off.
Welcome to the forum!
Did you get the collecotrs edition? If so this is where you shoud look for an answer:
That is under the God of War section of the forums that can be found here:
Good luck with your DLC warrior! Hope to see you in the arena!