Supersonic randomly invoices for services not rendered!

We moved into a house in Midlands Estate, May 2022, which we rented. I took over the rooter and the cables we already active. I literary just opened an account, everything was already there. We bought a house of our own and I gave 2 months notice that I am terminating the contract with Supersonic, our last month being December 2022.

All of a sudden, 30 May 2023, I get an invoice and a debit order is put through my account for an amount over R2000! Luckily it couldn't go through because I did not have enough money in the account. I call to find out where is this coming from. "It's a claw back invoice for the installation and rooter fees". That is bullsh*t. I did not get a new rooter or anything. A guy came out to check if the lines where active, and they were. That's it! No new rooter, no installation was done, NOTHING!

Who the hell gives you authority to put a debit order through for this account again??? I do not owe this company anything. I gave the correct amount of notice, I did everything right, this was a month-to-month contract. No installation or new rooter was given to me. I am NOT paying this money.