¿What can I do if my reedem code doesn't works ?
My reedem code doesn't Works. How can I solve my problem
What happens when you try to redeem it, what message are you getting ?
Was the iTunes card issued in the same country as your account is based (they are only valid in their country of issue) ? If it was and this page doesn't help with the problem then you could try contacting iTunes Support (you will probably need to give them images of the front and back of the card, and possibly its receipt) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then iTunes Cards And Codes