Purchased music won't authorize/play

And now, the Apple Support person who said he was going to call me, didn't. He won't return my emails. I'm out a couple of hundred dollars of purchased music I was able to play until recently.

I've authorized, unauthorized … sent in every computer serial number I used to purchase music and the music gets stuck in a loop that asks me to authorize something that's already authorized. This is obviously an Apple CRM nightmare that iTunes simply refuses to fix.

I also have hours of my valuable time gone dealing with Apple's mess. I really need help and Apple is turning a blind eye.

Why would I ever buy any music from iTunes again? I've never had this issue with Amazon or CD Baby.

Can someone help me, or will I just get ignored.