Question marked as
You will want to sent those pics to the Support link in this article.
If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support
In the future, never purchase gift cards that are accessible to the public. Some retailers sell them behind a counter where they are more secure. It is a common scam for people to record the serial number and then cover them back up with the gray scratch off decals that are easily available on Amazon. Once the card is activated, they will spend the money before you get a chance to. The retailers need to be held accountable to protect this from happening as well.
Strange seeing that store location, I shop there as well.