Call centre bulldogs

I received a call at 7:25 am from *** from a Palesa from MBD. First she was talking ****led as if she was talking through a scarf, as there was nothing wrong with the line. She then explained the reason for the call, and asked me to confirm my details. She was then insistent I had not met my commitment with them. I explained that I had transferred the payment, 4 days ago. I opened my banking app and I saw it had reflected 18/06/2019. She was insistent it didnt show on their side, and very insistent I should do a debit order. I told her no I explained to the lady before why I didn't and I would transfer the money. Her tone then changed and her attitude as well, as if she was speaking to a school child that needed to be kept in line and needs to be forced to do something. NO MBD that is the most unprofessional manner of doing things. You should not teach your call centre people to do this. She then proceeded to insist when I get handed over (as if its going to happen) they will charge interest and I will be liable. No reference number given with regards to the call. I dont know if you feel this type of manner of doing business is professional, but you guys honestly need to get your manners in order.