Bad Service and rude staff

Hi

I took my car in to get a major service on the 28th of June 2019. I left the car there in the morning like I would when it goes in for a service. I picked up my car on the day and made a payment of R2158. They told me that the car was fine until on the 16th of September 2019 the I tried to start the car in the afternoon and the car would not start. I got a technician to check the car and he advised that the car had not had a service. I added that the car had gone in for a major service on the 28th of June 2019. I called Car Care clinic Menlyn where the car had supposedly been serviced. They stated that they only have record of the last service they conducted was in November of 2018, yet I have a slip from them for the 28th of June 2019 as well as proof of payment from my bank. I told them that I would come in to talk to them regarding my refund as it seemed that the service had not been done. I spoke to the guy that claims to be the manager. I went in on the 19th richter to the manager. He became defensive which then made me angry and I asked for the slip that I had given him. He told me to leave as I didn’t want to do what he wanted. I left the store and then the “owner” called me and instead of asking what had happened and my side of the story he threatened me and was shouting. Which made me even more angry that an entire business owner would conduct themselves like that when a customer has issues with the service they received. I’m highly disappointed that we pay for services and are treated like this by business owners that don’t care.