web.com Charged my credit card but says I am not in there system Internet

Dear Skeetie:
 
At Web.com, we take the concerns that you have raised in your post very seriously. As such, we would like to follow up with you regarding the details of your experience with us. To accomplish that, we ask that you send your website domain name, your contact information, and the details of this post to our support team via the following link: http://support.web.com/.
 
Thank you for your help, and we look forward to hearing from you.
 
Executive Support Team
Web.com

So this company just out of the blue put 16 numbers together to put a charge through on and it just happens to be your card.    Wouldn't it be more logical that you had someone steal your card number and was trying to use it?  If that is the case what good is them cancelling this charge going to do for you?  That does nothing in keeping that same person from using your credit card again.  So while inconvenient the best thing you can do..for your protection... is to call your bank and report your card number stolen.

But wait..it gets better in your case. 

You stated...
I did't even accept any service for web hosting because all were too expensive..
- So you weren't some random person, you apparently went to their site to look at services.   So did they just make a lucky guess at your credit card number or did you somehow enter it in and just forget to mention it when you wrote this report?