ABSA Credit Life Cover being ********ly debited on Credit Card despite cancellation of policy

Despite cancelling their credit cover policy in March 2017, ABSA has been ********ly debiting this on my credit card. In-spite of written assurances that the cover has been cancelled they still debit the credit card. Their complaints department is inept. I have escalated this issue and no credible feedback has been received in 3 week. This is despite me sending and re-sending both the initial cancellation email and as well as the forms that were sent in March 2017. This is ****************. they dont even have the courtesy to respond . pathetic really.