I've had similar problems with online payments. It'll register with the company that the payment has been received, but the bank balance doesn't reflect it. Maybe the company hasn't officially withdrawn the funds yet?
Ev, I'll have a drink with you. I have a Cinemate theater system--$$$$! And it doesn't work. Granted, its three years old, but if it had been cheaper, I would have just chucked it and bought a new one. After dealing with tech support (very nice people btw) I was adviced to send it back for repair--another $100! After I find a box large enough, pack it well and lug it to UPS. I'm so frustrated right now.
On the other hand, my AIWA system in my bedroom is alive and kicking after 12 years...it still has dual cassette tapes!