Horrible Telkom Service

I had a internet contract with Telkom for the past two (2) years which ended at the end of September 2018. My wife requested a cancellation as per their electronic application as told by employees of Telkom. However I keep on receiving an invoice for the account and my account being debited. I went to a Telkom office and with the assistance of a sales representative canceled the account again and received a reference nr. ********** 3 on the 31st Of October 2018 that it was cancelled and the WiFi signal to my router was switched of shortly after BUT IS WAS ONCE AGAIN DEBITED AT THE END OF NOVEMBER 2018 AND HAVE RECEIVED A INVOICE FROM TELKOM TO BE DEBITED AGAIN BY THE END OF DECEMBER 2018. This is unacceptable as my wife and I originally cancelled the account on a 30 day provision and then again there after and these people just keep on taking (*****ing) my money without me having anything. the WiFi router is still OFF.