Terrible service from Nedbank mfc

Hi I have a car finance with Nedbank mfc ,I called in mfc last month to explain my problem I had at work and that I could query it due to my company being closed ,the agent told me she had frozen my account for April and May,I called in again to see if it was done ,another agent said it was done ,however mfc still tried to debit me ,and I called in again ,agent advised they not sure why I was debited and a supervisor will call me in 24/48 yours ,it's been a week and no one as called ,I called in again today and was told they cant assist cAuse my account has been handed over ,my account is only over due for few days ,they told me call another department ,I called 5 times even stayed on the line for up to 30 minutes with no response ...the service that mfc is gives is appealing and agents don't know What they are doing ...