The ESP Guitar Company

I did that too. I mean I guess they'll just email you. All u gotta say is that you did it by accident.
If you didn't send in your bank account number already there's nothing to worry about.

I do this kinda thing on computer configuring building websites too, sometimes I buy and sometimes I don't. 

Yea man, i would NEVER ever worry about something like this. When you're on any custom order site for a big order, no one is ever gonna charge you until you're sure about your order since it's a custom build (computer, guitar , suit etc).  It's actually way more headache to the person making something for you than you simply cancelling something. 

Hey Ricky and anyone else: no worries at all. We're aware that a number of people tried to enter the sweepstakes and instead inadvertently entered it as an order, and got an auto-response from us. We're in the process of making that less confusing now. In any case, this is not a problem. Thanks for checking out the configurator, by the way!