This is what I receive when I send them e-mail for canceling Auto-Renewal.

Dear Customer,

Thank you for your message. Please be advised that this inbox is not being monitored and you will not receive a response. If you already have an open support ticket, please reply to the last message you received from us. If you do not have an open support ticket please contact us through the contact form at http://www.bitdefender.com/support/contact-us.html Once we receive your message we will respond in the shortest time possible,

Thank you for your understanding, Bitdefender Customer Care