Why do I have to keep paying R282 while I don't even have any active contract with telkom

I had a contract with telkom, was paying R140 for 10gb, it was a router, I went to cancel some time during lock down I think in June because I ddnt want to renew my contract. Recently I discovered that theyve been debiting R40 from my account for some 500mb data which I did not sign up for, I reversed that money, and u was penalises R200 for that, on the 23rd of October they debited the R282, now I'm receiving an invoice that I have to pay another R282 by 15th November. What is it for, because I did cancel that contract I was not even aware of and payed the penalty for reversing my money for the sake of my credit record.