Poor after sale service

I bought my nissan np200 5 years ago. From the start it had problems with the aircon. Every year I took it back to get fixed as it was still under warrenty. It was taken back 7 times over this time.December 2016 it was fixed the last time after engaging with Nissan South Africa to assist in the matter and to investigate poor workmanship or poor product quality. No feedback was given to me after my car left the gerage.Now the car is out of warrenty and the aircon is not working again. Please advise as to what i need to do now.