Vehicle Finance - Deducting wrong amount

I have vehicle finance through ABSA, after signing the contract a new debit order came through on my banking app. Most of my details are wrong and they are deducting the wrong amount from my bank. I have phoned them 9 times to correct the details and after2 months this is still not sorted out. Worst service that I have ever experienced. I have also spoken to Mmami Motiti, Tilla, Phumzile Mazibuko and more...