ABSA VEHICLE Double debit.NO RESPONSE

I had informed ABSA vehicle finance that i needed to change my debit order date and account for my vehicle finance, after which the debit order went off on both of my accounts after i was assured that it is impossible. I had to write the debit order back from my personal bank (not ABSA), this month it happened AGAIN.I had emailed two of the employees of the department 1-2 week prior to this latest date to verify that this has been sorted out and wouldn't happen again, my emails have been IGNORED.