Unauthorized debit order

I honestly hate that I have to always come here for FNB. I get paid on the 25th and that's when my debit order goes off. If the 25th fall on a weekend or a holiday then it'll be a day before or after. My funeral debit order went off on the 15th, who does that?, because most companies will debit on the 20th in December, where would someone that gets paid on the 25th have money on the 15th. The debit order was obviously unpaid and then I'm R115 for an unpaid debit order. Please make it make sense. I bank with you people and you couldn't even track the account to see if there are funds available before debiting. Please fix your mess and reverse that unpaid debit order fee because I am not paying it. Honestly what is wrong with you.