Bad service recieved from CMH volvo Cape Town

Have been trying to book a date for mechanic repairs on my volvo v60 since 22 October 2024, only got a date for 09 December and was told to pay 50% upfront whereas my car has a warranty on it. Yesterday I had a breakdown that could have been avoided if I was given an earlier date and had to towered my car to them, mind was supposed to drive the car to the Eastern Cape to burry my brother and I couldn't, even when I beg them to try to give me an earlier date but they rudely refused. Now my car is with them but they still refuse to attend to it. If anyone out there who has a way to directly speak to their management, please I'm begging him/ her to advise them re-our frustration we receive from their staff