Telkom Billing practice is unfair

I would like to complain about Telkom's billing practices, as I think many of us are doing.. but for me, its been about eft payment that I have been making for the last 8 Years on the 27th of every month with no issues what so ever, but ever since I have refused to upgrade my contracts due to service degradation in my area with no resolution in sight and that the new packages offer less for more money I opt to remain on my current packages on a month to month bases. Now they want to charge me with a rogues debit order rejection fee with was never a problem in the past, why is it a problem now after all this time? Even after they said I don't have to worry about it I can just pay them as I always have.. I have tried to log calls to get the matter resolved for these last two months they just don't want to help me with the matter, My ref number with Telkom is as follow: ***3