The forums aren't as monitored as they used to be. Your best bet is to contact customer service, directly. There is a link to a contact form and also some phone numbers on this page:http://www.keyboardmag.com/subscribe
Because they charged your card already, I'd assume that you have been renewed, but if you are unsure, it certainly doesn't hurt to check. Try the contact info in the link and hopefully they will be able to verify your subscription for you.
If you have any further issues, be sure to let us know.