Worst treatment at Mazda Edenvale

I took my car for annual service at Mazda Edenvale. I dropped it just after 7am. At 15:15 I arrived at the garage and they told me that my car was serviced they busy washing it I must pay which I did. I waited for my car until 16:40 they kept on telling me to wait while the other people just came, paid and took their cars. By 16:40 when I got to my car I found that it was not washed, it was still dirty. I arrived home very late as there was traffic congestion at that time and I was with a child. When I got home I realized that the service warning light was still on meaning that I paid R5999 for the service that was not done on my car. The following day I got a call from someone asking about the service. She said she was a supervisor I told her what's happened. She said she will talk to the manager. Till today, I'm still waiting for them. I want my money so that I can take my car for service. Always when I call they tell me that the manager is busy. Now my car says it passed due date for service and the service warning light is there as a proof that my car was not serviced. This is the second time they made me wait like this. It happened in 2023 all the people who arrived with me in the morning they fetch their cars and left and I was the only one who had to wait up until 17:00 for my car to get serviced. N. W Phahlamohlaka