Cant repair anything

Car went in to have aircon repaired, less than a month later it stopped working again. After complaining to Haval HQ (who did nothing) the car went back on wed to have it repaired. I was told on the wed that they had no spares and car would only be ready the next day. I asked how I was supposed to get home and was told they don't have loan cars so basically tough luck! I had to uber home and back to work the next day. Got the car back and 3 days later aircon doesn't work again! I'm amazed how difficult it is to repair an aircon, it must be the most difficult thing on the planet to fix, will probably have to get a rocket scientist from NASA to fix it. Best part is it costing me a fortune in fuel to drive up and down as they don't seem to have any idea what they are doing. The service staff also couldn't care less, when I asked why it keeps breaking I got the shrugged shoulders. It boggles the mind really, I thought Eskom didn't have a clue! This is the reason GWM products are so cheap.