The deletion of an account doesn't have an impact on your subscription payments. For that you also need to cancel your subscription or request a refund as well.
To delete your account (we're really sorry to see you leave), open your account management, log in and click on 'My Settings’.
Scroll down to the bottom of the page and click on 'Delete Account'.
An account deletion can't be undone. It's final, meaning you can't ever recreate it again, neither by the PUK for this account.
Please note, that a cancellation doesn't result in any refunds as it is a separate event which is only triggered by the Support Department based on your request (via e-mail at: firstname.lastname@example.org or via Live! Chat sessions).