Billing on account for ADD ON INTERNET BUNDLE

I have been struggling for 5 months to get an amount of R139.00 off my account. I get billed for an ADD ON INTERNET BUNDLE for which I HAVE NOT ask for. Every month I phone and they tell me that it will be taken off my next account. Come next month, it was billed again. I ask for a refund of the money, but they can't refund me! I get billed for something I did not ask for & then can't get the money bac****!! I am so frustrated!!!! Stood in a que for almost an hour at TELKOM KEY WEST and still they were not able to assist - just gave me a number to call! This morning I phoned 081 180 - the lady told me that she opened a case, but I still have to pay that amount at the end of January 2018. If this does not get off my bill, it means that I have to wait another month and PAY for the next month as well!!!! In the mean time TELKOM gets rich by *****ing my money!!!! This has to stop!!!!!