Absa embroiled in ********* practices

I took vehicle finance with Absa last year November 2019. my 1st instalment was in November month end 2019. Wit banking details provided before I sign the contract, they failed to debit my acc, I then transfer money I went to vaalmall Absa and request them to reinstate the debit order.to date I'm still doing transfer from my bank to them Today on the 01/04/2020 I did visit Absa again to reinstate the debit order Furthermore I'm that my account is behind with R2000. In January 2020 I took two policies for my car. This two policies were combined with my monthly installment and push my installment to R7500 per month, moving my monthly installment from R6500. I have tried to call Absa to resolve this issue with no success. How can Absa do amendments to my contract without informing me. I have found Thier conduct to very much unconstitutional and I need this arrears reviewed and my account be brought to the correct amount owed.