I am writing to inform you that I will not be renewing my health insurance policy with [Insurance Company Name] for the upcoming period. My current policy is set to renew on [Renewal Date]. For your reference, my membership number is [Membership Number]. Please ensure that any payment instructions for future premiums are cancelled immediately, and that no further payments are collected from my account. Additionally, I would appreciate if you could refund any monies due for unused cover, if applicable. Once my policy is cancelled and any refunds are processed, please confirm this to me in writing at our earliest convenience.