Previous complaint still not resolved

On 24 November 2014 I wrote a report about Nedbank who charged me 4 x R90 HonFees on one day for the first time since I've had the account DESPITE ME BEING UNDER THE IMPRESSION THAT THERE WERE SUFFICIENT FUNDS IN MY ACCOUNT. Shortly thereafter someone from Nedbank contacted me and simply told me what I already knew: that the HonFees were charged because there was supposedly not sufficient funds in my account. I explained to her that there were funds in my account at the time of conducting the transactions, but that the transactions did not go through immediately and by the time they eventually went through, there were not sufficient funds anymore possibly because of old transactions that went through in the mean time (that I though had gone through long ago). I told her that I'm not at all happy with her response, as she simply told me what the call centre already told me. I wanted to know who I can talk to about refunding me that money. She said she will look into it, but has never come back to me ever since. It is unfair that I should pay that money as Nedbank has never before charged me those fees (under same circumstances) and has never communicated the concept of HonFees to me