Payment arrangement fault

My first email to Absa Vehicle Finance was on the 7th of December 2020 to make payment arrangements for my 4 month unpaid maternity leave, in the first place the lady responded with the incorrect information and since then I have send multiple emails and tried phoning multiple times where the line just goes to voicemail. As my maternity leave started this January I haven't gotten any response and my car payment is almost due for this month.