I was passed your email this morning and wanted to follow up and make sure that we're able to get resolve this issue. I'm hoping that you can provide some information first to help me identify the cause of the problem.
First, what is your iTunes Account ID do you use to make purchases from the iTunes Store, and is that the same iTunes Account your phone is synched with?
Secondly, you mention that the content on your phone is unplayable. Does that include when your iPhone is not tethered to your computer, or is it only when the iPhone is connected to iTunes?
Regards,
Dan Erlewine
Manager, iTunes & iTunes Store Customer Experience
derlewine@apple.com | 408-218-****