incorrect debt orders causing additional bank char

I am highly upset regarding the fact that 8ta has deducted my monthly instalment for my account on 24/07/2015 when my deduction date is set for the 25th of every month. I now have additional bank charges due to this debit order being returned! I called the call centre to sort this issue out and all I could get was them reading out their policies to me. This is a clear indication that this company does not care about their clients. No one could give me an explanation as to why my account was deducted on the wrong date. And being the weekend is not an excuse because I have several other debit orders that goes off on 25th and all those went off successfully. I want this unnecessary bank charges refunded by 8ta immediately as this service is unacceptable!!! When I called the call centre this morning a consultant (tsesido or something like that) couldnt assist and then just transferred me to a different call centre agent when I asked for the manager. Another example of poor service by this company!!!