This jerk is a total scammer.
Read this thread and his recent thread offering to place the order for you.
Nobody buys gift cards with BTC only to sell the same gift card at a 20% loss for BTC again.
Check him out on here:
https://bitcointalk.org/index.php?topic=803691.new#newSounds about right lol.
If the gift code isnt applied to your account, thats red flag #1.
Another possible red flag would be the code could be wrong, that wasnt purchased by bitcoin. That was earlier mentioned above.