Bad service and empty promises

I bought a car on the 19th of December 2014 that they claimed it had a full service history, within three weeks of me driving the car it over heated, took it back and they promised to fix, a month gone passed and they called me to come collect it, later the same day of collection I switched on the aircon and water was coming out of the dashboard vents below the windscreen, took it back again they promised to fix it then run an 80 point check. They brought it back to me meanwhile it failed the check. I sent it back again and told them I don't want it anymore. They promised to source me another one of the similar value and price but it has been over six months but no progress. I have been paying for the car for the past six months but I have never enjoyed the product I bought from this dealership. I regret going to Barloworld Mazda Bruma. After the bad service I have received, I am crossing my fingers for them the settle the account with Wesbank.