Discovery taking unauthorised double payments

After 20 years as a happy Discovery client, I have had a massive repeating problem over the last about 8 months.

I am responsible for the payment of 3 accounts (and have been for years). I always pay per eft. I have never had a debit order.

Recently I keep getting debit order reductions after I have already made the eft payments. It has happen 3 times (the last being a few days ago), but once on the one account, twice on another and not at all on the third.

I then each time have to have a massive fight to reverse the debit order (that is not suppose to exist) and get my money back only after a few days. In the meantime my other debit orders return unpaid because of this and reflects badly on my name.

I have called numerous times and cancelled the debit orders that I did not consent to in the first place and it keeps happening.

I am very unhappy with Discovery. The Staff keep saying that everyone has debit orders and that it will go off only if I pay eft after month end. I pay anything from 4 days before month end to 3 days after and still on some accounts never had a debit order went off. Other I pay before month end and still the unauthorised debit order goes of. Non of this makes sense. On the previous two occasions I specifically arranged that any debit orders be cancelled. And now I have to again waste have a day to sort this out.