Unfair R695 Penalty Fee After Double Transfer Error

I have been banking with FNB for many years, and I am extremely disappointed with how this matter has been handled. A double transfer went through on my account, which I only realised the following day. Unfortunately, that same night a debit order was processed, and due to the unexpected double transfer there were insufficient funds in my account at that moment. As soon as I became aware of the issue, I immediately transferred money into my account to honour the debit order. There was no intention to avoid payment, and the situation was corrected without delay. Despite this, FNB charged me a R695 penalty fee. I contacted Secure Chat, but the assistance I received was unhelpful and did not resolve the matter.