I sent BD customer support telling them I want to stop the autorenew on my subscription but all I got was this response:
"If you require the assistance of a Customer Support Team
representatives, please review the below information so that we can help
you with your question(s) as fast as possible.
If you have DOWNLOAD, BILLING AND/OR SHIPPING QUESTIONS, you can visit
our Customer Support:
Here, you can find information to assist you with the following tasks:
- Download a digital order
- Check the shipping status of a physical order
- View and print an invoice
- Get answers to common questions
If you still need to contact our Customer Service Team via email, this
can be done by accessing our email webform. To get to the Customer
Support webform, simply choose 'Contact Customer Service' located at the
bottom of the FAQ page. When completing the webform, make sure to
include your Order Number in the field provided. If you do not have an
order number, please include the product and site name in the comments
filed."
Now when I sent them an email via webform I get the same autoresponse email.
I tried Live Chat but the representative told me to send customer service an email to address the problem.... 
Anybody have any other links or ideas how to contact customer support? The reason I dont want to autorenew bitdefender is because their customer support is almost non-existent, this just proves my point.