Cancel of subscription handle very bad

I cancel my DSTV subscription at the end of August 2017 for the end of September 2017. That is a months notice that DSTV required. At the end of September 2017 DSTV still *******y deducted the amount of R 980.00 out of my account. After a number of phone the call centre told me that the repay amount would be R 785.00. So according to me after DSTV MADE A MISTAKE THE CLEINT IS BEING PENALIZED. I call this day light *******. No wonder they got millions to waste on *******.