I have purchased a £15 itunes voucher redeemed it but it will not let me purchase anything with it

Question

i purchased the voucher from a tesco store and redeemed it no problem
i cannot purchase anything with it as it keeps asking for bank details
i phoned apple support and they told me to go to a store.
i went into an apple store and was told they couldnt help me unless i made an appointment with the genius bar, so i simply told the guy what the problem was and he simply told me i had to phone apple support.     so i re contacted the support 08000 number but they gave me a 0844 number which i refuse to call because it will cost me more than £15 to get my problem solved
i am absolutely outraged that apple has stopped live chat as matters like this were always resolved so easily and were alot less stressful
i am easily stressed and with heart problems this does not help my condition at all
i will not forget it as i refuse to curl over and allow a multi million pound company steal £15 from me and demand me to pay more money by phoning them to resolve a issue that is not my fault

Answer 1

Your issue is with the iTunes Store, and they have no phone support nor live chat and to my knowledge never have. The Genius Bar and Apple technical support cannot help with iTunes Store issues. Go here:
http://www.apple.com/support/itunes/contact/
and follow the instructions to report the issue to the iTunes Store.
Regards.