Supersonic/ Frogfoot/ Vumatel

I had fibre at my previous address by Frogfoot and my ISP was the infamous Supersonic. Start November 2020 our service was disconnected. We found out that they over charged us on the account. After numerous endless calls, which got no response, I went onto the then Twitter. I was informed that FrogFoot discontinued our service by accident. I copied Frogfoot on queries and was promised continuously that they will sort out the account. This cost us a small fortune as my daughter was in matric and most lessons then was online. I was on Twitter every day, and therefore I say infamous. Complaints similar to mine, was posted almost daily but nothing was ever sorted out. We eventually decided to drop fibre, because Frogfoot was as hopeless as Supersonic. We moved to the North and continued using LTE. Recently we decided to apply for fibre with another ISP and was told the they can’t connect us because someone else is using the fibre connection, Vumatel, at this address . HOW is this possible? We live here. Then I got a message from Supersonic telling me that they cancelled my contract and that I need to settle my account. For crying out loud, they overcharged me and owe me a refund. I have messages on Twitter from November 2020 to July 2021 explaining this. So am I to understand that all fibre companies are Actually the same one. Why am I being held at ransom because Supersonic don’t have competent people doing their accounts? I’m a pensioner at home, and I can manage accounts better.