Gift card numbers get applied on the second page of the online checkout, right underneath the credit card details. Insert all the numbers, and the 4 digit CV2 code on the back of the card (scratch off the grey stuff, and the numbers are underneath).
You still have to put in your credit card details to complete the order, but it will only be charged if there is a remaining balance. If it still doesn’t work, make sure it is the same currency in which you are placing the order. Gift cards/certificates bought in one country, can’t be used in a different country.
If you are sure the gift card is in the same currency, you can put the numbers into the customer comment box with a note saying please use my gift card for the purchase. The store will contact you if there are any questions or problems with your card.
