Impossible to cancel Telkom Landline, Telkom Menlyn Worst service imaginable

We are trying to cancel my mother's Telkom Landline. Cancellation was supposedly done on 2 November, to be effective in 30 November when the last payment will be made. We then were billed for another month, queried, was told by Nomsa (Manager at Menlyn) that we do in fact need to pay one more month, which I then payed at Pick and Pay next door.The manager told us then there will be no more payments due, she will rectify it on the system since it wrongfully shows ANOTHER payment due. Come January, and another payment goes off. I went back to Telkom Menlyn. Nomsa was not at work. Wendy Ngoepe 'adsisted' us but kept saying the payments were a month behind ****rue). Then Elsie Molefe tried to take over. She would not understand that the September payment she doesn't see went off beginning October, and October went off end of October. Previously Nomsa showed me the payment records and we went through every month and all was payed. I then asked Elsie toe please show me the records again on her system so that I can show her.. she started yelling at me, saying she will not be told what to do, I can go to the bank and draw 3 months statememts. I showed her the debit orders on the phone banking app. She refused to look at it and refused to assist further because I will do what she says, She will not do what I say. Eventually a gentlemen assisted and logged a querie. This will be the 4th time we are told that no more payments are due. This is horrific service, I should have listened to all the warnings about dealing with Telkom. NEVER AGAIN