Unfair , unauthorized debit n bad service

I canceled a policylast month the beginning of was a life cover meaning since I did not die I canceled it before death I must be given back my money no it was never the case then month end still they deducted the premium again after I canceled no refund this is unacceptable and unfair because if something happens I die they are going to reject my claim saying the policy was canceled I want my money back all it