Ps3 download problem?

I bought a ps3 metal gear edition with a free voucher for Pain but everytime i insert the code it tells me its a wrong code or not valid i email and call sony and after more than 4 looooooong calls and sending 2 faxes they give me another code but Im still having the same problem does somebody knows something does this happend to someone else?

I think you can answer faster than sony

I dont put the codes here cause maybe they are working and is my ps3 the one with the problem