Unauthorised debit order blunder

Yesterday(24 Oct 2017) morning a debit order was kicked off my business account with the ref: Elite Radiator. When I called the FNB ***** line there was a disclaimer stating that they knew there was an issue with business accounts being debited incorrectly and reversals would happen midnight. When I checked my account today no reversals where done, on top of that FNB was quick to charger me an honouring fee of R155 because your blunder as fnb pushed my account into the minus. Today (25 Oct 2017) when I called the ***** line a lady by the name of Eileen told me that she would call me latest 11AM regarding this matter it is now 2PM and I've received no call. Such blunders cripple small businesses as it robes them of a much needed cash flow. This is utterly unfair, how long should a reversal take? No accountability whatsoever! Please refund me!!!