NO SERVICE FROM FIAT MIDRAND

We bought a Fiat from WE BUY CARS and since we bought the fiat, it gave us problems. We didnt even have it for 1 day . This fiat has been at Fiat in Midrand for 3 months now, since we bought it. FIAT can not tell us what is wrong with the car, WE BUY CARS wont take responsibility for what is wrong with the vehicle. So in other words. We BOUGHT to car from WE BUY CARS .. and we can never drive it because it does not work. FIAT don't know what is wrong . Not acceptable ... FROM FIAT AND WE BUY CARS...