I’m sorry to hear you want to leave WordPress.com! Is there anything you may need help with before you go? WordPress.com accounts are permanent, but you can easily delete your blog. You can read more about this here:
http://en.support.wordpress.com/settings/delete-blog/
http://en.support.wordpress.com/deleting-accounts/
If you are trying to unsubscribe from email sent to you from WordPress.com, go here and click on “Block all subscription emails from WordPress.com”: http://wordpress.com/#!/read/subsettings/
Canceling a domain means you completely give up ownership of the domain and can take up to 35 days before it will become available to register somewhere. If you would like to completely cancel your ownership of the domain name, please reply to confirm.
We are only able to offer a refund if we receive notification within 48 hours of the purchase. For full details, please see:
http://en.support.wordpress.com/domain-mapping/cancel-domain/
If you would like to transfer the domain to another registrar, you can use these steps:
http://en.support.wordpress.com/domain-mapping/domain-management/#transfer-to-another-registrar