Dirty Dealer

I financed a new car with my wife as a cosigner, took possession of said vehicle and within one week the dealer repossessed the vehicle on the grounds that my cosigner wife had a suspended drivers license. AT WHICH POINT i was ASSURED THAT MY CHECK HAD BEEN DESTROYED. Two weeks later I receive a call from the dealer who states that they had paid the sales tax and registration. By this time I had bought registered, insured and paid taxes on another used vehicle for cash which died and was "junked". I got a third car and was refused registration as the first check had "bounced" (the NEW car) and I am now responsible for $1500.00 to register any car which has cost me jobs (money) suffering (four children) and contributed to separation (wife). Previous counsel was unable/unwilling to persue having been "stonewalled" by the dealer for documents/dates 2 1/2 years ago. Please help.