Vumatel: Quick service but terrible internal communication

I have Vumatel fibre in my flat. They were quick to make installations. The trouble came after a geyser replacement caused issue with the fibre. For one week (including Saturday) I received technicians popping up at the gate of my estate. The only reason I am aware is because my estate had to refuse them access as I was not at my flat at those times. This caused daily highly disruptive phone calls through out the week at work from the guards. This is despite me arranging an appointment with the call centre for 7 days after the fibre interruptions. During the period before the appointment, I still had technicians trying to get in and the call centre calling me. I told the call centre everyday that I had an appointment for 6pm, the Wednesday. On that particular day at 6pm, vumatel technician was expected to arrive. At 6.30pm I called the call centre to find out what had happened. They said he was delayed at another job and I had to wait. The call centre could not tell me when to expect the technician but indicated that he would knockoff at 10pm. I waited until 9.30pm whereupon I called the call centre again and they told me he had trouble entering the estate. I then quickly made arrangements with the guardhouse and called the call centre back to give them the access code. The call centre then informed me he had not left the previous job yet but informed me he would be coming. Anyway no one pitched. The next day early, I called the call centre to complain that despite an appointment no one came to fix my fibre. The call centre employee then told me one cannot make an appointment and that technicians are allocated a case. I fiercely disagreed as I had spoken to other operators prior to the appointment as well as during the arranged appointment time where no one indicated so. The call centre then told me the technician would call me to make an arrangement. By late afternoon I called the call centre again to find out if any arrangements were possible. The call centre had my old address and told me that no problems could be seen with the system. I told them this is impossible and explained what had happened so far. I then called a minute later and another operator picked up. The operator then contacted the technician and informed me he will come after 6pm and will call me beforehand. This is still a ridiculously long waiting frame and at this moment I have no confidence that the technician will call/that he will pitch nor whether I will have to explain my story for the 100th time to the call centre.