When you purchase through iTunes, we do not have the authority, nor the technical ability to help you manage your subscription, stop the renewal, or issue a refund. You will need to take action through your iTunes account.
For information on viewing, changing or canceling your iTunes subscription, please visit your iTunes Support Page.
If you purchased your subscription directly through our website, and would like to stop your future renewal, please visit this article: How can I turn off auto-renewal?