I have an ipod touch 6th gen. It works great. But I can't get it to download music. I can access the store, find the song(s) I want, and click the buy now option. However my ipod is telling me the payment method failed and must choose a new one. I have used the same method for a few years now and other than buying itunes cards (which i cant due to hospital stay) I have no other way to purchase music.