REFUND ME the debited premium from a cancelled policy

Discovery, you advised I should email to advice I was cancelling my policy, which I did, followed by my THREE calls to you call center, to arrange removal of your digicore tracker. This has all taken place by 31st May, I see you went ahead and debited me for June, but subsequently there has been no communication or attempt to REFUND me my premium on a cancelled policy that did not go beyond 31 May. Please REFUND me my money.