You can delete your Oldwoods account yourself at any time: sign in, open Settings, and at the very bottom choose Delete my account. Your hero, your letters, your points and your looks are deleted for good.
If you cannot sign in, use Forgot your password? on the front page. With a confirmed email address you get a link to set a new password, and can then delete the account yourself; otherwise write there that you want the account deleted, and your message reaches the keeper, who will delete it.