Hey Adrian, we value your time, privacy, and protection as much as we value our own. To that end, we - like most major retailers - occasionally verify orders placed to ensure that nothing is amiss. That practice is in place to ensure that no one is using your credit card without your permission.
That said, if you have an existing account with theory11, this sounds like it may have been a mistake - but rest assured that our support team is made up of normal, awesome, totally cool people ready and willing to help. Send them back a message (and I'll make sure they reach out to you ASAP) to ensure everything is resolved 100%.