Multichoice Exploitation

My Dstv account is paid via debit order on the last day of each month, unfortunately this month there wasnt enough funds so the debit order bounced. After 3 days my services were disconnected so I called Multichoice to reconnect my services and obviously also pay the R50 reconnection fee. To my surprise my account is now in arrears by R108 because Multichoice didnt disconnect my services on the last day of the month but a few days later. Let me understand how is this my problem that they didnt end their services with me timeously coz of non payment now I am stuck with an extra amount of R108 on top of what I already need to pay. I bluntly asked that my services be cancelled for good as this is nonsense but Im told it can only be cancelled once I pay the R108 lol... Multichoice is losing so many customers and its so sad they dont realize it because they busy exploiting people and making them pay huge fees whereas they repeat all the nonsense we watch. I need that amount of R108 to be cancelled, I will not be liable for such incompetence!!