Telkom is absolutely pathetic

I cancelled my ADSL line with a consultant over the phone on the 20th May 2015 and she ensured me that it had been cancelled and that I be billed for usage until he 20th June and only pay the rental fee of the line thereafter. She didn't advise me that there would be a R197.00 downgrade fee that would be charged due to me cancelling the ADSL and only keeping the landline. I then received a bill in July for the ADSL and landline, I called the call centre to query this on the 20th July and the consultant advised me that it had been cancelled but that she was not sure why I was still being billed for the ADSL line ,she advised me that she would send the details through to the technical support to follow up. I then called the call centre on the 27th July to cancel my landline as well as I was not impressed with Telkom's service.I have been called on by Priscilla on the 13th Aug to advise me that they working on the cancellation on the landline but have no answer on the bill I received for the ADSL line. I REFUSE TO PAY R900 FOR A SERVICE THAT I CANCELLED 5 MONTHS AGO AND THAT I DID NOT USE OF IN JULY AS WELL AS THE DOWNGRADE FEE WHICH I WAS NOT ADVISED OF. URGENT RESPONSE REQUIRED.