Priceline rental car

I was trying to book a minivan for my trip to Florida 1/18/09 to 1/25/09. I decided to try Priceline.com to get an inexpensive rate. I selected the minivan option, since the only vehicles that will work for us (we have 7 traveling) would be a large SUV or a minivan. I did the "name your own price" for a minivan for $18. It was rejected. I figured I would keep trying different increasing dollar amounts to get the cheapest rate. I then tried $19. So then a confirmation page came up and said that it was approved. However, Priceline reserved us for a MIDSIZE car which is not what I was attempting to book. I immediately called contacted customer service and they said that they would make an exception and reverse $192.49 of the total charge of $211.49, that had already been charged to my credit card. She said I would be still be charged for the price of the rental car for one day! I asked if she could resubmit my offer of $19 for a minivan which is what I was attempting to do; however, she told me that she was unable to do that. I am very upset that I am being charged $19 for a 1-day rental of a vehicle that I cannot and never intended to use, nor reserve AT ALL. The rep stated that the reservations are non-refundable and the website confirmed the type of vehicle. I explained that if I had been able to book a minivan I would have certainly wanted (and kept) the reservation because that was what I was needing and attempting to reserve. I explained that I did not see anywhere on the webpage, prior to the confirmation page, where it confirmed the type of vehicle that I was requesting. The entire time I was inputting the "name your own price" transactions I was attempting to reserve a MINIVAN. She again stated that there was nothing that she could do. I plan to continue to submit complaints via their website/email/phone, and also to contact my credit card company since I was NOT attempting to book the vehicle that Priceline assigned to me. midsize vehicle would be of no use to us during our trip and it was not was I was attempting to reserve. I did not see any type of confirmation of the vehicle type on that particular screen, before submitting the request and do not understand why I would have to pay $19 for one click of the mouse! I am in the hopes that this problem can be amicably resolved. I have emailed them and requested to please do not contact me back with "well, our policies are...." I know what the policies are, but Priceline should have the responsibility of being FAIR to its customers in this type of situation, regardless of "the policies." I know it's only $19, but to me its simply the principal of being ripped off. And, it seems that this is a common practice of Priceline. Priceline sucks!