Sounds like you're upside down in this car already. To get your money out of it you will most likely have to "drive it out".
I've been throwing money at mine since I had it but I can't get back what I have in it. When people comment that I "drive a Benz, I must have money", I don't say "it's an old one" anymore. It takes as much to keep an old one up as it does to buy a new one! Somebody out there needs that head, put it in the swap shop.