You can turn off Auto-Renewal on your account page but to sort out double-billings or any billings you want refunded you'll have to contact Customer Service directly.
The link is under Useful Links at the top of this page.
Telephone Customer Service
To speak with a Customer Service representative, call us at 866-622-3911.
Average contact length: 10 minutes
Estimated wait time: 5-10 minutes
Hours of Operation: Available 24x7
VrusScan Plus is the basic protection, antivirus, firewall and SiteAdvisor
Internet Security inludes more features, some optional.
They will explain it all to you.