FNB with there debit orders when there are no funds to debit from..

Jooooohhh FNB... You seriously need to stop your ****... Going on - - R930 so far for this month.. I've already paid Cell C1200 of the 1800 that you keep on trying to debit from my account.. STOP THIS ***!!!! Every month you try debits before there is money in my account and than it gets reversed.. Than I have to pay fines because of this ****.. Please just stop this *******..