KIA Northcliff sold me a new car with issue with no courtesy car and passed buck to non existing customercare

We purchased a kia 2700 truck from Kia Northcliff that was supposedly a new car that would give us peace of mind while the workhorse works and pays off its own installment . To our huge disappoint the car worked for 2 days and the temperature gauge started rising to alarming degree, we contacted the sales person who basically has no after sales s****s whats so ever and said to contact the customercare department which doesn't answer phone calls and took days to answer complaint laid via email . Sales person Vusi advised we take truck to a kia dealer near us which was Kia Eastrand Mall, where the car spent 5 days as we had to wait for thermostat to be ordered!! We went back to the kia Northcliff branch to lay a formal complaint as we had not even received a courtesy car while the car was not working, the Principal dealer Collen was not available and did not even bother to return my call after I called in to lay a complaint, on arriving at the branch we spoke to the sales manager Portia who sold us alot of hog wash on how the process would not have taken this long had the car been at their dealer and basically we still have no courtesy car to offer as our employees are more important and are using the cars !! The car was eventually returned and 2 days into using it the temperature problem was back again! We personally drove back to Kia Northcliff to demand another brand new car only to be turned away again with no assistance as they can only be instructed by the customercare department , they sent us with promise to provide us with a courtesy car only to be called by Portia Monday 18 Dec 17 to be told the truck is used by another very important employee who is on leave they cab basically provide a private car as courtesy car. So Im so crazy to go and purchase a truck at their dealer when I could have simply used my private car to carry the goods that the truck delivers. The non existent customercare, personnel Fiona has the nerve to tell me they can only assist me once they have taken the car kia deal for diagnosis and after prompting her on what we should do in the interim and the car spends further days not working advises that they will hire a courtesy car for us at our expense of a refundable deposit which we are liable for as it can not be wavered even though my 1st car installment is due on the 25 Dec 17 . This car has spent more days not working so for my inconvenience and stress I need to pay deposit for a rental car, really kia???? in addition an installment for a car that has not been working. I am so disappointed with KIA Brand as a whole, the lack of after sales service, efficient and professional customercare department puts the brand in the worst category of all bad brands in SA