Poor service

At first I was very impressed with the service and the demonstration at my home. I ondered the bed and paid a deposit. Unfortunately I received an enormous bill from Cape Gate Mediclinic that my medical aid did not pay an I had to cancel the bed. It was still in the 7 days cool down period. Since Monday 01/07/2019 I have phoned their offices 3 times and every time I get the impression that nobody wants to get involved. I have WhatsApped the rep that did the demo and took my deposit but with no joy. I am really frustrated. Aftersales service should not be this poor. I wonder what would have happened if I did buy the bed and had problems afterward?!