How to activate an iTunes gift card

What you normally should do is go back the retailer from whom you purchased the card and discuss the problem with them. They should either correctly activate the card or give you a new one. If they refuse to help, as some retailers do, or this was a gift so you cannot contact the retailer, go here:

iTunes Support

and follow the instructions to report the issue to the iTunes Store.

Regards.

i have the same problem but can i activate it myslef online or do i have to get a new card ??

You cannot activate a card yourself. As I said above, you either need to go back to the retailer who sold the card or contact iTunes Store support for assistance.

Regards.