CANCELLED DEBIT ORDERS BUT STILL BEING DEBITED

Cell C has been making mistakes with debits on my account since last 2017 Aug and this matter was only sorted out in Feb. Since then I cancelled all my debits and advised Cell C telephonically and via emails of the way forward that I will be paying via EFT on a monthly basis and this was done since Jan 2018 since Cell C's billing department is useless or maybe the Customer Care department is useless and does not know how to communicate with the billing department! However I now received a sms saying that I have an outstanding balance of R69.99 and I need to make payment to avoid my line being suspended. I called in only to find out that this is for a failed debit order... Not sure how this is possible since I have been paying via EFT for a few months and now all of a sudden this is gone back to EFT??????????????????

When will the Cell staff check all tick boxes and LEARN how to do things correctly?????????