if they ship both phones, they will just charge you full retail for the second one if you accept shipment. If you don't want the second one just don't accept shipment, they can't charge you.
I did that for the iphone 3g. paid full retail for a second phone and sold it on ebay for over $900. made a few bucks
So you ordered two subsidized phones, then when you only activated one they charged the remaining balance of the unsubsidized cost and went on with their business? Or was there more to it?