Bad service and bad connectivity

I thought I have seen bad service in South Africa until I signed up with Supersonic. I have never seen a service provider who does not care about their clients like this. The only thing they do well is to collect money but customer service I don't even think they know what that mean. I stayed with supersonic for more than a year everyday promised that my issue will be fixed but they could not be honest and tell me that they do not know what to fix. The did all the speedtest you can think off, changed routers, did all sorts of reconfigurations but I could never get proper connectivity. I could not even do a simple zoom or teams meeting with their WIFI.Then I finally was enough and I cancelled their service and they cant even do a simple thing and cancel a client that they have failed to service