INCORRECT BILLING ON MONTH TO MONTH

I am absouluty shocked with DSTV I pay month to month I call in ask what I owe go to pick n pay , pay then call back payment reflects and they reconnect me, If I cannot afford DSTV for the month I do not activate it then when I call back I always ask for the full amount as I understand there is a re connection fee, now however they say I am in the arrears I spoke to Tinyiko who was no help at all he kept repeating himself over again like I am 2 years old, I call in and DSTV gives me the TOTAL amount to pay as I asked for and now its in arrears due to someone not giving me the correct amount to pay and now becomes my problem, I am NOT liable for the outstanding balance on DSTV as it was not my lack of knowledge and understanding to the amount outstanding , please can you assist ASAP in correcting this issue .