Horrible service from DSTV - account over charging

In December 2017 I took up a DSTV premium contract. I indicated that I will not need installation which meant that my premium was going to be R40 less. In March 2018 I noticed that I was overcharged by R40 and called the call centre so that this can be rectified. I received an email with a reference number from the billing unit indicating that my query will be resolved in 24 hours. Nine months later, the issue is still not resolved. Every time I call the call centre I am told that they understand my problem and they cannot reverse the charges and they have escalated the matter and someone will work on it. After all this time nothing has been done and I am told I cannot speak to the billing people but the call centre people are not in the position to assist. Last week I spoke to Clyde Letsoalo who promised to resolve my problem and call me back by end of business, I am still awaiting the call. On 27 November I spoke to Palesa who was on the line with me for 34 minutes (at my cost) and she indicated that her supervisor will call me to resolve the matter, I am still waiting for the call. I have never received such bad service from a service provider, I actually want nothing to do with this company anymore.