You could file a case in small claims court for the amount you paid to get the car out of the lot. It is unlikely that you would get emotional damages, but you never know. You'll also want to evaluate the cost of filing the case and the time involved. I would bet in the end that it would not be worth it to file, but that is a decision only you can make. You could also file a complaint with the Better Business Bureau.
For more information on the small claims process check out:
You can absolutely sue in small claims court. I believe there is a California law that says if you are illegally towed, you can actually sue for twice (or maybe even three times) the amount of money that it cost to get your car back!
You can sue the tow company in small claims court. You can possibly get 4 times the amount charged if the tow company is found liable. See California Vehicle Code Section 22658.
Omer Rangoonwala, Esq.