Supersonic Terrible Service

I engaged Supersonic to install fibre at my house through Metrofibre and they went to install SADV. When I required why I was told that there is no Metrofibre in my area. I however do know there is Metrofibre in the area and in any case they should have consulted me first before installing SADV. As I wanted the fibre quickly I did not object to them installing SADV which was installed more than a month ago. It then took long forever for them to send the router which I tried to install without a success. For the past three weeks they have been promising to send a Technician and have had 2 Technician appointments not fuilfilled. Their call Centre line takes 30 mins to get an answer. Their whatsapp number keeps taking you from pillar to post and each time you have to repeat your whole story. I asked for a cancellation a week ago but still have no confirmation of cancellation and where I can send their router. They are now asking whether they can help and avoid cancellation but still they dont give me a date when the Technician will come. To make matters worse for me,I have tenants in the house whose relationship with me is now being compromised. I know most ISP suck but Supersonic are the worst. Their service and responsiveness is the worst