Debiting the account while they said it was canceled

The absa car insurance has debit my account even when they advised in December that they have cancelled it, I never used this car insurance before. I tried to call the call center but it seems no body seems to care, they absa Bank said they can't reverse it because is an internal debit order, I'm going up and down because they have access to my funds and can debit any time they want to and refuse to reverse sayin is a internal debit order. I need my money back I can't pay for the insurance I didn't subscribe to.