Very disappointed in the service of mfc nedbank

Did purchase a car and got car finance by MFC 28feb 2021 from 12March 2021 my worse nightmare start the car did give non stop problems till today 06Oct 2021 the car is still with dealership did ask help from MFC nedbank and no help was provided.I will be on maternity leave from 1sept till 31 Dec 2021 and did Make arrangements to pay half of my monthly installment because i will only receive third of my salary. All the needed documentation i did send to them and did receive feedback that i have been approved for a 4 month half freeze on my account.End of Sept the whole monlty installment was deducted and not as discussed.When i call mfc i speak to several people and nobody can help.very disappointment is the service i received from this nedbank MFC