Horrible service from Scheduling department

I was excited to deal with Cartrack as I have seen so many people being happy. At first my experience was great, the best service, but this was short lived, all because of the scheduling department. I was told they will contact me the same day. For 2 days I heard nothing from them and then received a call that the technician is at my door. But there was no appointment set! I spoke to the guy and said I work on the road and they must first arrange with me. The again I heard nothing. Then yesterday I called after 12pm. The guy said that there was a schedule for 8am and I wasnt there. So AGAIN they set an appointment without contacting me. No call, no sms, nothing. I explained to the guy I cannot do 8am as I work on the road and if they can help me at 10am on any other day. So he put me on hold. After nearly 10 minutes the phone just went dead. Then this morning I called in again. Then I was told I had a booking for 3pm. I told this guy as well I cannot do it. Then he told me well you cannot do 10am in the morning at all. He said I must stay at home from 10am to 4pm and see what happens. Really??? I work on the road!! I work for myself so I must lose R2000 for the day because you cannot give me a time? He then blamed me, saying that I do not communicate with them. Yet I am the one who keeps calling them. I asked him who gave permission to make appointments without consulting me or even sending me messages. He said they cannot see that info. Which I think is nonsense. I ended up telling him to just cancel as I really cannot struggle like this for a simple thing like a installation appointment. I am not spending more money on call to get service, this is nonsense, so please just cancel everything and do something about this terrible service from the scheduling department.