Lying about repair progress

My D/C Scorpio had to get it's 10 000 km service, I reported a minor problem that need attention with the wiring underneath the steering wheel. The lady advised me that the vehicle needs to go to an Auto Electrician. I stressed the fact that I need the vehicle back on Friday afternoon the latest. She updated me that the Electrician will work on the problem on Saturday and might have it finished, she was very uncertain about her facts, I wanted an exact answer as to when it will be finished, she babbled and started shouting at me. I wanted to collect my vehicle and to reschedule a convenient time for me to be stranded without wheels. She told me that the bakkie is completely stripped and I would be held responsible for the bill. I took it to my own discretion to go and check what is going on. It has not even been touched, he is closed on Saturdays. It is very unprofessional not to give a client the option of renting a courtesy car from the dealership to get about. My partner also owns a Mahindra and he has also had endless encounters with horrible customer service EVERY time. They also said,we are not welcome at their dealership and refused to help us and to complete service.