Bad Service

I yesterday called MFC to change my debit order to Nedbank banking details and all was well. Too my surprise this morning I am sent a Debi check for an amount way over my agreed installment amount and when I called them i got a ridiculous explanation ever. When would I accept installament amount of what was never agreed on and you say that Debicheck makes you accept a high instalment incase you default, I have never defaulted on my payment even during covid. I then requested to speak to the manager regarding tmy issue cause I rejected the Debicheck and told that they will call me back, I was speaking to a gentleman called Ontshepeng Zwane and he advised that Jecoline Phoko would call me back and I am still waiting. To be exact it was 09:15 when I told Ontshepeng to have his manager call me by 10:15 and until now one has called me, this really shows how your bank don't take clients serious and only attend to them on basis of who they are. I even doubt that this message will reach people who knows what customer because already I have a bitter taste about the service already.