Debited on the wrong date

I have a Home loan account with Standard Bank. My debit order goes off on the last day of each month. On the 20th of Feb 2018 the Home loan debit order went off. I did not have sufficient money in my account therefore the debit order was unpaid. I was charged an unpaid fee of R60. I phoned Home loans to query this as I did not authorize them to debit me on the 20th and to also request them to reverse the unpaid fee they charged me. The consultant who assisted me said I should email my complaint to: ********** I emailed my complaint and but I did not get a response.

On the 21 May 2018 Home loans debited my account again. I did not have sufficient funds on my account. I was charged an unpaid fee of R60,53. I don't know why they keep on making the same mistake over and over again. My credit status is going to be affected because of their stupid mistake. I want them to reverse all the charges on my account