DQ Track can't keep appointments

I was supposed to have my DQ Track installed today. The appointment was confirmed over a month ago and I ensured that my diary was free to make the appointment. This meant moving some important meetings and staying late at work. When no one arrived for my appointment, I had to call discovery insure. They then informed me that they couldn't make the appointment without providing a reason why. I asked for the manager to call me and low and behold, I am still waiting for that call. I can't believe they couldn't even be bothered to give me a call to reschedule the appointment. If I had not called them, would they have just forgotten about me and taken my installation fee? Considering that I have my medical aid and all my insurance with Discovery, this poor service and lack of courtesy or concern about the issue is making me wonder if I should consider my other options. Very disappointed.