My credit card is not being accepted and in-app purchase that I was charged for I did not receive
I have been using my debit card to make in app purchases and I have money in my bank account. for some reason my debit card is no longer being accepted and some charges that I was charged for I have not received. im Not sure if my bank is declining purchases or iTunes is not accepting my card. how or where can I figure why this is happening?
iPad Mini Wi-Fi + Cellular, iOS 11.2.5