Discovery life debiting cancelled policy’s. Update your system

I cancelled my standalone educator policy on 22 August 2018 and was informed the cancellation would be processed within 30 calendar days. I was debited end of August for the policy and did not mind as there was a notice period. End of September discovery decided to debit my account again and i called querying why i was still being charged for a cancelled policy. (The 30 day notice period had lapsed). They said they were not sure what had happened but had received my cancellation letter. They assured me that they would cancel the policy immediately. I then went on to cancel the debit order inorder to retrieve my funds. Today i logged into my discovery profile and found that the very policy i cancelled two months ago is still reflecting on my profile and states that the account is in arrears.