Upgrade nightmare

I went for my phone upgrade in June at Rosebank Telkom. The Telkom representative mistakenly opened a second contract instead of just upgrading my cellphone. I was under the impression that he immediately cancelled the second contract but 01/08/2015 I was debited R5600, I logged a complaint that same day but the debits keep coming despite my calling the help centre numerous times. Telkom billing Representative RG Modiba eventually contacts me on 15/09/2015 and still she could not sort out my billing, but felt it wise to cut off my cellphone service. Of course once my phone was cut of RG Modiba would not respond to emails. I have been a customer of telkom for 5 years and have not missed one debit order until they started billing incorrectly because of a Telkom employee error, I have no problem paying my telkom bill provided it is correct, and I have politely been trying to sort out the problem for two months, but instead I am being treated like ******* and get cut off. I am going to switch service provider if I do not get this sorted out immediately