Click on the "Menu" button.
From the drop down, click on "My settings".
Go to the "Delete Account" option located at the bottom of the page. Please note that this action is irreversible and will permanently remove all of your data. Ensure that you've canceled any active subscriptions before proceeding.
Type in your account password.
Click the "Delete account" button.
Type DELETE to permanently delete your account. Then press "OK"