Wrongfully debiting my account

Absa continuiosly debits my account twice a month using different references when I cancelled my policy 11 months ago. The service is pathetic trying to recover all the costs I have incurred reversing and trying to stop thier debits. Try calling them and it's a nightmare getting a hold of them. The last person o spoke to 3months ago assured me I won't be Debited again and that the finance department said it was a system error. But that was a lie and they still continue to debit me. I'm glad a chose to cancel my policy with them, would never want to do business with a company like this! I got an email address to submit a request to claim back all my costs but I recieve a system response with a reference for my email but no one ever replies or assists with my query. I have sent them 3 emails thus far and it know seems like they just avoiding me period!