Disgusting speeds and service from Supersonic

I am absolutely disgusted with Supersonic. I ordered the installation of my fibre line through them at the beginning of July. The line was installed on the 15 July 2020. The fibre provider was Link Africa. The Supersonic technician only came through on the 23 July 2020 to install the router. He sat for an hour trying to get the Internet Connection up and running but to no avail. According to him, there was a problem with the OMT box, which was provided by Link Africa. He was in communication with someone from his office, and prior to him leaving, he notified me that his office was going to get in contact with Link Africa to sort out the problem and it should not take more than 24 hours as it was something they could do remotely. I was contacted by Supersonic on Thursday, and they updated me on the problem. I did not hear from them for a week and they did not provide me with any update. Eventually, I took it upon myself to contact them to get an update. I went through countless call centre agents but nobody could give me an update. Eventually I tried to go through to a Supervisor or Manager, and even then, there was always one reason or another why I couldn't get through to him. Eventually I took it upon myself to get in contact with Link Africa, and within 48 hours they sorted the problem out, and notified me that they had not received any communication from Supersonic regarding the problem. This evening, 12/08/2020, I tested my link and my speed was just under 20Mbps. I contacted Supersonic to determine what speed was on my profile, and I was told that my listed speed should be 50Mbps. When I told them what speed I was getting, the agent's statement to me was that I should expect such speeds at times. While I understand this is a best effort service, nobody can tell me that I should be receiving less than half my intended speed at any time. Even during the days of ADSL, speeds hovered around your intended speed and only became a problem when there was a problem on the line. I cannot believe that Supersonic was voted as the 2nd best ISP in South Africa according to the MyBroadband website. That is absolute ******* from my experience with them.