your purchase could not be completed
I have a problem
When I wanted to buy from inside one of the games I figured this message
your purchase could not be completed
contact itunes store support to complete this transaction
iPhone 5, iOS 6.1.2
Apple Event: May 7th at 7 am PT
Evidently there are two Apple IDs that have been used as sometime or another on your iPhone. I get the same message on my iPad. Luckly I've recorded my two IDs.
your purchase could not be completed