Hallo i brought the game on steam with the cerberus key and the promo key and i used them when i brought the game and it worked fine but.....
About a month agow i had to restart my comp cus it crashed

and now i cant seem to be able to get the DLC back it keeps saying "Unable to redeem code. That code has already been used, and cannot be redeemed again."

What can i do to get the items back? they aint in my "registered game content" and i dont have a clue about what to do.
Can anyone help me or give me and advise?
Quincer