penalty fees charged for FNB mistake

FNB deducted 3 amounts of R1000 out of my account total being (R3000), after days of trying to get this resolved they refunded the monies back to me but now I have been charged with penalty fees by FNB due to my debit orders not being able to go off my account as well as penalty fees for these amounts being reversed yet it was FNB's fault!!!!

04 Jun 2018 #ITEM PAID NO FUNDS 5 ITEMS ON 18/06/ -220.00 01 Jun 2018 #ITEM UNPAID NO FUNDS -75.00

Now I need to spend another 5 days trying to get these amounts refunded back to me its ridiculous how much time and effort one bank can cost a person due to their lack of competence