Battlefield 4 (Origin Game Time) Problem

[mindlessrack]

Dear EA ;

I've recieved a one-use game key for Battlefield 4 on game time , Origin. It is a 1 week key and there seems to be a problem I could not solve. I am having an error message that the key is unavailable for my country or that the key could have been used a second time for another account on origin , yet it remains to be unknown that I've ever used the key before since I have used it for the first time. I seek your advice in this urgent matter and solution to the problem due to key usage for second time. Thank you for your time , I'll be waiting for your respond.