To cancel your account ignore all notifications of payment and don't renew a subscription with us when your payment is due. Your site will automatically go off line at that time.
If you have a PayPal payment plan make sure you log into your administrative web page and click "cancel payment plan" on the right-hand side of the page. You will be prompted to log into PayPal where your payment plan can be canceled.
Trials automatically expire within 10 days.