Actually they do answer emails. They usually do within 24 hours or less.
Make sure you tell them exactly what the problem is about and post a link to the hub your inquiring about (if that's the case).
If you are sending an email do so from the help center and use the contact form. They will get back to you so long as the inquiry is valid or urgent.
Here is a link to the contact form
Before sending your email, check out the learning center or help section to see if your problem can be resolved.