SMS notification on low balance and honourary fees

I received a low balance sms directly after the debit order that caused the low balance. The debit order resulted in honorary fees being charged as the balance in the account was low. How am I suppose to ensure that the account balance is sufficient to avoid honorary fees, when I only receive the alert for low balance once the honorary fees have been incurred? This is not my first bad experience with honorary fees and Nedbank. Nothing to be done now, but please ensure timely alerts.