Poor service

I took my car to William Simpson in Tokai for a service and to find and fix a vibration on my car. The service was done which was very expensive, R5800 to replace air filter, oil filter and oil. They told me the vibration was from the propshaft and they can't fix it. They referred me to a third party. So the agent cannot fix their own brand of vehicles. A short time after this, I noticed a fluid leak under the car. I took the car back and was told they would not check the vehicle without an appointment. I was told that I must make an appointment on another day to bring the vehicle in again for them to check what the problem was. Very poor customer service. I took the vehicle to Maistry Motorsport in Kommetjie who checked the vehicle. It took 2 minutes to find and diagnose the leak. I would have expected William Simpson to provide a similar level of service.