Upset by the response from FNB for assistance

I resigned from my company this month and only heard today that instead of being paid on the 25th, I will only be paid on the 28th (the last day) - unfortunately this is a ruling of our company that I was unaware of. So, the next best thing would be to contact my bank and ask them if it is possible to carry those costs (debit orders) for the additional 2 working days - I also need to mention that my salary goes directly into my FNB cheque account. Apparently there is nothing that FNB can do for me. This after having an account with them for over 30 years. My question is, what does FNB actually do for me that validates their service fees!?! Is there anyone who can assist me in this regard?