Payment
I'm trying to buy something on Clash of Clans but I keep getting the same result. Could not complete payment.
iPad, iOS 10
If it also says to contact iTunes Support have you done as instructed and contacted them ? If not you should do so : http://www.apple.com/support/itunes/ww (click on your country's flag, the country where you live, and which is therefore the country on the account ; click on Contact Support towards the top right ; click on Get Help under 'Talk To Us’)