bad service

I went to capitec bank Rosebank mall branch on 29 April to enquire why was my loan installment debted from the incorrect bank account. I had advised them to debt from my Nedbank account but this month's installment was debted from my capitec account. I asked the consultant to reverse the money as this wasn't my money but my niece's lobola she said they can't reverse it and she added that capitec doesn't debt during the weekend that is why they debted prior to the agreed date and from the capitec account. when I expressed my frustrations the branch manager said I won't get my money back and that when I took the loan I was all happy this made me feel humiliated as people in the bank were looking. As we were busy talking the consultant that assisted me earlier laughed as if i was a stupid not making the situation easy. Then Saturday I received a notification that another amount was debted from the nedbank account. I'm really not pleased with this as this has caused an inconvenience in a big way.