You can logon www.drivehq.com, go to My Account page, then click on Subscribe --> Current Subscription to see if you have any subscriptions.I checked it for you. You don't have any subscriptions with DriveHQ now. You will not be charged.
Could you please email DriveHQ customer support why you want to cancel the service? DriveHQ offers tons of high-end business features. We are seeing more and more businesses adopting cloud services. So it is surprising why you want to cancel it?
Our service is priced extremely low for business or enterprise customers.
Compared with Dropbox.com, which charges $795 for only 5 user licenses, and $125/user/year for additional users, our user license is only $6/user/year.
We offer many times more features than Dropbox, yet our price is many times lower than Dropbox for Business!
For SMBs with tight budget, please contact DriveHQ sales and see if we can work out a better deal for you.