Refusing to cancel my insurance and refund my premiums

I requested my policy be cancelled effective 30 September - but Discovery Insure still debited my account I called into the call centre and was transferred 03 times before I had to leave a message for someone to call me back - I was advised that the retentions team is in a meeting and I cannot get put through - I was informed that the TAT for a call back is 24 hours, it's been a week now and no one called me back. Recommended solution: Cancel the policy - refund me the full premium debited from my account. when I called in and had to eventually leave a message, the call reference I received was ***. I will next be reporting Discovery to Ombudsman if my premium is not refunded.