I can’t buy anything in the App Store but I can get free things although I have a 15 dollar currency
I bought a 15 dollar gift card and i put in my account but when I try to buy something it just says “Your purchase could not be completed”
If you are also getting a message to contact iTunes Support you should contact iTunes Support (these are user forums, not iTunes Support) :
- go to http://www.apple.com/support/itunes/ww
- click on your country's flag (the country where you are, and which is therefore the country on your account)
- click on Contact Support towards the top right
- click on Get Help under 'Talk To Us'