Billed for something I never even received

We upgraded to explora end of September. Until then we enjoyed the premium sub for years. Upon viewing my account I saw that I was being billed for compact since July 2017. How is that possible. The call centre advises me to go the the Mpumalanga agent and they must sort it out. How on earth can I have a premium and compact service on one tv??? It is so easy to disconnect the service if one does not pay but boy oh boy if they have to pass a credit hell must freeze over first. This is the worst service ever. I paid my account up to date every month and even paid more to build up a credit. If there was another supplier of this service I will drop DSTV in a heartbeat. I want my account cleared of all the charges. We had premium all along and explora + extra view since 22 Sept 2017. I want it fixed.