I am trying to download an app and it says theres a problem with my previous purchase and to check my purchase history. I used a Vanilla Visa gift card for itunes and it says that the security code is not in the bank database. It worked fine before but now it says i owe $23!! The card had $20 on it and I made some purchases and noticed I went past 20. I assumed one of my relatives redeemed an itunes card and I was buying from them. (My account is used on a few of my relatives devices). Please help I cant download anything!!