I recently moved back to the US from London, and could not close my account before leaving because I could not get through to a person on the phone. Your website has an error message when I try to fill out the form to close my account, "Sorry, that date doesn't look right. Please check and try again." anytime I try to submit the date, no matter what day I use. I've tried emailing customer service but got no response. How can I close my account? Thanks!