Charged in advance without any agreement

My customer number ********** 1 I have upgraded to premium from compact plus,surprisingly they have made some small charges in advance till November 2019,I called when I noticed that my DSTV was disconnect,that’s when an Agent on Saturday advised me that ,there is some charges in advance till November,on which I did not make any agreement with them to do it,on top of that they keep on adding reconnections fees,when I called today ,they did not make any reversal,and I was advised it takes 48 hours to be done