DSTV call me to pay up when I've already paid

Really irritated as a Multichoice consultant called me today to tell me that I owe them R899 for my monthly subscription and must pay it immediately. This when they I've had a debit order for more than 2 years. with them. The lady who called insisted that I pay cash when I explained to her I know how I pay. Then she told me to cancel my debit order and phone the call centre to create a new debit order. I call the call centre and the automated system tells me I owe R899 and I've been cut off and must pay to reactivate. All this harassment when I've been a loyal, paying subcriber for over a decade and my accounts are up to date. Really upsetting, ****ed my attachment to the brand. This kind of treatment will incentivise me to move to Netflix who don't treat me in this manner.