Bad service

So on the 25th of Dec Dstv loaded my router with 200gb instead of 400gb and by the 6th of Jan it was finished and I called them and they rectified their mistake and I was happy. Today the 6th of Feb I call them and they telling me that the 400gb that they loaded on on 25th Jan is finished, when I asked for further explanation the first agent who was so rude(Sikelelwa) hung up on me. I called again using my own airtime and I was speaking to another agent(Ron) who was just as rude as the last agent and when I asked to speak to his manger he refused on a recorded line that I can't speak to his manager. When I asked him to spell his name he didn't want to. It is for this very reason that I'm going to cancel that contract with them