You can delete your site by logging in to your site click Admin--->Delete site. But if you would like to delete your account, please advise and we will do it for you.
If you are a paid subscriber though, please don't forget to cancel your subscription if you have a FuturePay agreement set up through RBS WorldPay. You can do this through by logging in to your Account on Moonfruit.com > Billing > Cancel your subscription.
Paid subscribers who wish to close their account can also contact Support to place a request. This is to ensure we get the request from the site owner.