I am being hoodwinked into buying a car i can not afford.?

[Babylyn]

I took my carin for the airconditinor to be repaired on 7/25/11 they said it was the wiring i paid $335.00 took my car out on 7/27/11 got home airconditinor stopped.turned around took car back to Potamkin cadillac. now the said i need a programer i gave them a programer they said it was defectived store told me, have them give a dianostic report why programer don"t work the will give me a full refund. they said no problem when i went to pick up dianostic report, o no we are going to use the programer. you need a new car, my car has 87779 miles on it, i said i want my car. they said now my brakeline has detriated oil is leaking out and i will need a towtruck to take it out. it is now 9/2/11 and they still have my car.please please tell me what can i do.