Bull shritt service at absa

Bad customer service received from a consultant at Absa vehicle finance. I'm trying to change my debit order date to last day of month. She says it's not possible. I'm telling her that most of my additional income is coming in month end and that the possibility is that on the 15th there won't be money in my account. She is refusing. I asked her, if you don't get money on the 15th what will happen, she says the car will be in arrears and that's what I'm trying to avoid. Sort out your kaaak please. This is bull****. Kedibone Bayane said it's not possible. Sort this **** out