Bad service

I have never dealt with such incompetence. I called DSTV to change my debit date due to my salary date changing. I was advised moving forward i would be debited on the 26th an amount of R643.55. They have since disconnected my service on more then 3 accounts and on each occasion i called in for them to fix the error and reconnect my service. They did not debit me as per our agreed date then they disconnect my service once again with a new amount of R793.56 payable. This is totally unacceptable and i have to now wait for their finance department to revert and this may take a day or 2 meanwhile my service has been suspended.