I suggest you go to the Amazon store website and look for the LET US HELP YOU links which are at the bottom right of the screen. These forums are only used by authors who publish on Amazon. You want amazon.com, not kdp.amazon.com.
Harry Hoge wrote:
I am publish circa 15 novels with KDP.
But only authors and aspiring authors read these forums and KDP Support deals only with publishing issues. Even if the gift card was given to someone so they could use it to buy your books, it's still an Amazon Gift Card, not a KDP gift card (those don't exist; even if an author uses the "give as a gift" button on one of his book's sales page, he's still giving a gift card that can be spent on anything in the Amazon store, it isn't only good for a book, and the KDP staff has nothing to do with it.)