I CANT REDEEM A GIFT CARD

We are fellow users here on these public forums, you're not talking to iTunes Support nor Apple - I've asked the hosts to remove the gift card numbers from your post (hopefully nobody else has been able to redeem it onto their account).

If the page that you posted from doesn't help then you can contact iTunes Support via this link (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