Cannot purchase apps in app store. Cannot get help with Customer Support
I receive this message each time I try to purchase an app or book. "Your purchase could not be completed. For assistance, contact iTunes Support at www.apple.com/support/itunes/ww/. I've called Apple Support a total of 6 times and I've been on hold for a total of over 3 hours. They said they fixed it THREE times, and told me to wait 30 minutes then try again. I've talked to 2 different Senior iTunes Advisors who gave me their direct line (which means absolutely NOTHING, because when I call back they won't answer or return messages). Supposedly my issue was going to be fixed by the iTunes "engineers" last night and an email was supposed to be sent me this morning. Of course, neither happened. I'm totally disgusted with iTunes Support and need my issue resolved and have no where to turn. I'm a very patient person, but I'm at the end of my rope. Any suggestions on who to complain to, since I'm getting nowhere?
iPhone 6, iOS 8.3