iTunes won't download pre-paid purchases without a valid credit card
I have a season pass to a TV show (The Big Bang Theory) that I've bought and paid for. I should be able to download the latest episode of this program regardless of the status of my credit card, should I not? I've paid for it... why can't I download it?
The short story is that my work had an unfortunate scheduling mishap with our paychecks because of the holidays and now I'm overdrawn, so iTunes can't verify my credit card. Why does it need to verify my credit card on a purchase I made months ago and have paid for in full?
MacBook Pro with Retina display, OS X Mountain Lion