Vumatel support utterly useless

For the second time in two months my fibre line is down and again I sit and wait for days for vumatel to fix it. Everytime I call the call center, I get told a different story. They told me that a technician will be at my house on the Friday evening of logging the call to fix my line. I sat at home the whole night just for no-one to show up. I call them the Saturday morning and they told me someone will come out during the course of Saturday. Call them again at 15:00 and they said someone should be by my house before 16:00. Call them again at 16:15 only for them to tell me that the technician can only come on Sunday. So again I spent the entire day at home waiting for somebody who didn't come. What I don't understand is why Vumatel can't just make an appointment with an exact time and stick to it. I can't sit at home the whole day to wait for them since I have to work. And everytime I call, nobody can give me an exact time. The previous time I logged a call, I sat without internet for 7 days. The technicians either never show up at my house during the times I scheduled or they simply show up at random times when I'm at work. Vumatel also appears to think that I have thousands of rands worth of airtime to waste on them so that I can call them twice a day everyday only for them to tell me nothing. This is the most useless Internet provider I have ever had the misfortune of dealing with. I am at a point where I am simply going to cancel the line and go back to ADSL, because even Telkom is not this bad