My cars ac was not working so mr Wilson gueraro a ...

My cars ac was not working so mr Wilson gueraro a customer service over there said it will cost me $286 just to check and they did not have any shuttle available so I hade to wait over their but fortunately while I was waiting I saw them parking my car at the back of the showroom after 3 hours they called me saying that they are done with the check up while I was waiting near my car all the time I never saw anyone doing check up on it. And the next thing they say it s $586 just for check up and not fixing it while they already said it s 286 before. When I asked them why 586 they said coz of costly freeon gas and 3 hours labor charge I said I was waiting near my car for 3 hours and saw nobody toching the car. And also I said if they put freeon then why is it blowing hot air but mr Wilson gueraro hade no answer to that.. they are fraud. O stars if I could.