Very bad attitude and refund query

I really cannot believe how bad the service has been at Telkom, I cancelled my account on the 19th July, I went in to Cresta branch and received a copy of the cancellation. In August they charged me the full monthly amount after been told that it should take approximately 21 business days to cancel, therefore August I should have been charge half the amount. To my surprise they charged me again in September after trying numerous times to call them and e-mail them about the cancellation that should have taken place in August. I eventually went to Cresta branch to try and sort this out and request a refund but apparently they don't handle account queries and they sent me back to square 1, calling the call centre. They were not interested in even looking for the original cancellation that was supposed to be sent through, the excuse was that they needed to know who the consultant was that I dealt with originally and they had no idea which computer the cancellation was sent with. I then sent through the original cancellation request plus a statement from August to show I paid the full amount (Sep they apparently didn't have a statement even though I paid) to the e-mail address ********** and I keep getting a different consultant saying that there is no credit due. I have advised them that I am disputing the fact that there is no credit due and I would like to speak to someone who can assist me and they tell me that they are the correct people and that there is nothing that they can do. Surely they should want to try and help their clients as best they could? But instead they are hiding behind their computers saying what they want to knowing that there is nothing we can do. Takondwa, Edman, Nthabiseng, Phindile, have been nothing but unhelpful and keep passing the buck with one line answers. I honestly cannot believe that a company can run like this.