Change of debit order date

I have advised outsurance about my change of salary date The consultant still advised that they will debit pro rata as per old date on the system I then told him if it makes sense what his saying guess what they debited my account yesterday with three amounts that are less than R50 and all debit orders returned and my bank charged me R150 by 3 System are meant to be human navigated and if the consulted took time to care I would be owing my bank this amount And I will be canceling my debit orders and policy immediately