Gross incompetence. Pathetic customer service or regard

My MTN Fibre to Home is provided by Supersonic but down since Thursday - today is Monday. I have phoned daily to resolve but gotten nowhere. I'm told someone will call me back but no-one does. Nor does anyone even try follow up or resolve this matter. I was told to phone Octodel, who is my ISP (how am I supposed to know this as a customer who thinks they are dealing with MTN, let alone Supersonic which is another separate company that in turn deals with another company). But Octodel then tell me they are not my ISP as my address is not on their system, so I call Supersonic back who tell me there is nothing they can do as there technical dept. handle this but the person responsible is not there and they don't know where he is. Needless to say, in today's environment with work and school online, this is a nightmare that Supersonic have not displayed any interest or accountability in resolving. If I could, I would switch immediately.