Telkom - worst service provider

My wife took out an uncapped adsl contract at telkom. We had it for a few months and we had problems with the line as cables was getting ****** constantly. our telkom was every month due the 15th of every month. They however in julysuspended the line the 14th of july. We could not get a hold of any consultant during that time. The 18th july my wife went through to their branch in claremont where she was told that somebody from telkom would contact her as we were tired of the poor service. They just installed fibre in our area and we decided to go with a different service provider. We again asked at claremont branch how do we stop this contract with telkom as nobody contacted us and we didnt have any internet for a month. Again we were told a complaint would be lodged and somebody would contact us. Up and till today nobody. We were however billed for august and september and probably october as well. We dont know who to contact anymore. Please assist.