No guarantee from Nissan Gezina

I purchased a second hand Suzuki Vitara from Nissan Gezina in Dec 2014. The car was only delivered to me on 2 February 2015, after several inquiries what the delay was, I got a reply that the vehicle was at Suzuki Hatfield for repair on an airflow sensor. The vehicle was driven from Pretoria by Nissan Gezina to Marloth Park, and delivered to us. Upon delivery we noticed that the vehicle needed 2.5 litre oil and other defects were detected . I decided to take the vehicle back to the dealer and on our way from Komatipoort to Pretoria, the engine completely seized up. I had the car taken to Suzuki Boksburg . After having sent numerous emails to Mr Van Vollenstee, without any reply from him, I had to drive up to Pretoria to see him personally. He assured me that he has already contacted Suzuki Boksborg to have the vehicle taken to Suzuki Hatfield. I immediately phoned both companies, and found that it was a blatant lie. After keeping us in suspense for a month, we were told by Mr van Vollenstee that they will not take responsibility for the problem, which is in contravention of the CPA.