DStv (MultiChoice) bad service with debit order clients

I am on a pricelock plan at Multichoice for the past 5 or 6 years. This month my dstv subscripsion was stopped 3 times. When I phoned the call centre the lady told me that multichoice had an system upgrade and that the debit order clients was not "pulled" througt from last month. I have spoken to 3 different people and on all 3 occasions was the amount I owe them, according to them, different. I do not know how I can owe them anything as I am on a debit order for the past 10 years.