I just read the help section, and it states to contact them at firstname.lastname@example.org. They also have a contact form to use for your convenience that you can directly link to from the hubpages help section. They also said to put the subject line "close my account" in your email in addition to your username. You may need to be patient for a response as it is a weekend and we don't know how busy they are. If you have other questions, I suggest emailing them directly as those of us here are just other average hubbers. I hope that helps and good luck.