payment method is not accepted
I am trying or 2 weeks now to download some apps on my iPhone 4s, but App Store keeps asking me for payment verification even if the app I am trying to download is for free. I verify my payment method, but it is not accepted. My credit card is totally okay. I re-entered my credit card info, but nothing. I even changed my password, but still my payment method is not accepted... what should I do?
iPhone 4S, iOS 8.2, null