MFC is handling customers and threaten with extra installments even though payments is done.

Good day, since their was an issue with the instalment, there was an email send with updated information and suggested to deduct the extra money every month. That did not happen. Every month an extra amount of R500 is paid over to the account. And still they threaten to deduct double instalment on a day there is not even money in the account. Phone call 5 times a day. Threats say no arrangements done. So please advise, what you suggest to do if you are not happy with an payment every month. Do I need to stop payment rather? and wait to see when you will be happy? Then you receive and message saying a double instalment will be deducted? If you do this one will still not be paid as there is not enough money, according to law I still need accommodation. Are your people like it to threaten people is totally handle you as you are a ********. Really this unacceptable. Maybe Esthelene Sauls think she is in control and can decide what she wants to do and have no empathy with any one even though you are making extra payments every month.