Debit Order rejection fee

Hi signed up for a Telkom LTE account during July 2017. I provided my banking details over the phone. The first debit order wasn't deducted and I phoned the call centre. The banking details listed for me, were completely wrong and not what I provided, over a recorded call. I immediately paid the difference via EFT. This month I got a bill stating a charge for R200.94 as a payment rejection fee. How can I be held liable, if I provided the correct banking details! This is more than my Telkom bill. I see 100's of complaints to the same effect, and can't help to wonder about *****.