Home cover

I took up a BetterBond homeowners cover in 2019. A few months later I sent a request to have my cover terminated as I had managed to find something more affordable. The policy has never been terminated and BetterBond continues to debit my bank account monthly. I have called the company several times and the consultants promise to cancel the cover and send my account for a refund but nothing has happened. Even today, I spoke to a consultant who promised to send cancellation confirmation in less than 10 minutes after we spoke but nothing has come through.