After applying the Gift Card Request Code, the Gift Card will be loaded into your balance outside of the Claim Code amount. Your Gift Card balance is automatically paid to orders during the checkout process. If you do not want to take advantage of your Gift Card balance in your order, you can remove it from your payment method selection while completing the purchase.
You can find $ 25, $ 50, $ 100, $ 250, $500, and $1000 gift cards for Amazon in this app.
You should check the generated code so you can see if the code is working.