Unauthorized bank account charges

I went personally to Telkom at the Phoenix branch and canceled my wifi account and the landline in June 2022, since then I upgraded to Fibre. However, I am still being billed and money was taken out of my account. I have tried contacting Telkom on numerous occasions and I can't get through. I find this very unprofessional coming from a company like Telkom. According to the Consumer Protection Act they are not allowed to take money out of my bank account without my Authorization. I am very disappointed with this Company.

My contact number is : *** Email : ***