Hi
you should be able to send PMs, especially to reply to an admin message. You use the reply button to respond to an existing PM or to send a new PM, use the drop down under a member's name left of their posts or on their profile page, or use Send New Message from your user CP
You can also use the
contact us link near the bottom right of all pages to reach admin
I am about to send you a PM which you can reply directly to