My service disconnected due to charges for internet that was Canceled

I just had a bad experience with Dstv I have canceled my Dstv internet May but they still charging me for it. Since I have canceled my internet May. I have paid for my subscription and funeral cover that I have for June. They disconnect my service after I pay normal my payment date on the 20th and 21st they disconnect my service. I called on the 23rd June spoke to Lindokuhle and he assisted me with charges that was charged for internet that I canceled. My service was online again. On the 27 June the disconnected me again. I called 27 again to enquiry about the disconnection I was told that I need to pay R200 and something. I ask for Lindokuhle that I called 23rd June to call me and explain what happening as on the 23rd June when I called he did assure me that everything will be sorted and indeed was sorted only for 3 days. Now I'm told I must pay R800 and something for charges for internet that canceled May.