Unwilling to resolve issue

I recently bought a Forester with only 40000 km on the clock. I was assured that the vehicle was fully in order. Soon realized the aircon does not function where really hot outside. Subaru took the car in for almost 6 weeks, returned the car with a stamp of approval from Subaru SA. The aircon still does not function when hot outside. Even the service manager admitted this. They then promised to take the car to Subaru SA, but no response for a few weeks. Just not willing to resolve the issue. After almost 15 years with the brand, 5 cars, I am now calling it a day.