Not impressed

I called Telkom in May '15 to cancel my ADSL and to convert my line back to a pre-paid line. The lady, Linda, said that she would call me in 7 days to do the conversion. Which never happened. I then received my bill for Jun 15 and was charged for the line as well as the ADSL. I queried this and to date have heard nothing from Telkom. I paid the amount of R266 for June. I received my bill for July and yet again being charged for items that I am not using. I escalated to Telkom stating that I refuse to pay for something that I am not using. To date no response. Telkom is quick to call that you haven't paid your account but when the tables are turned there seems to be no urgency. Can someone take accountability and resolve this matter.