Life insurance debit order - taken from my bank account - not my policy

A life insurance policy was deducted from my bank account under someone else's name, and I was unable to cancel it since I was not the policy owner. Despite informing the company that I had no contact with the policyholder, they continued to withdraw funds from my account each month for a policy that did not belong to me. While the debit order has eventually been stopped, my requests for a refund have gone unanswered. They took my money and won't return it.