Q: i can't reedem my itunes gift card please help me

What happens when you try to redeem it ? Are you getting any error messages ?

Depending upon what the problem is, if this page doesn't help then you will need to 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