Hyundai Edenvale- unprofessional and bad service

I service my car regularly at Hyaundai - Edenvale.

1. I took my car in on Monday 3 Dec 2018 to assess a winding noise from the engine 2. The "service adviser"couldn't identify the problem so I had it booked in for Thursday 6 Dec 2018 3. The 1st call I get from Hyundai is "what are supposed to fix"?"- no problem I told him that it's a winding noise 4. I get a call back 30 minutes later and it's the A/C power unit 5. I get a call 5 mins later and the lady says it is R3800 may they go ahead and I said yes and was told the part has to be ordered and it will arrive the next day and take 2 hours to fit 6. A minute after I get a call from the same lady saying that I need to put a deposit down for R1500 - this I refused and told her that it's a crazy and insulting since I had my car service in Feb/March and the bill was R13K plus which included clutch and brake pads replacement and NO deposit was paid. 7. I complained to the Service Manager stand in as the Service Manager was not present. 8. Some 30 minutes later the Service Manager called and said the price for the A/C unit is R16000 and I must put a deposit down 9. Needless to say I picked the car up and absolutely disgusted with the service and promise never to go to Hyundai -Edenvale and never to buy a Hyundai again! 10. Lastly, the previous visit to Hyundai was also a bad experience