There are two good ways to communicate with Hubpages admin - forums and email.
If you have a general question where the answer might be helpful to others, the best way to communicate is through the forums. It appears to me that admin is reading the forums, too and they seem to be very responsive through the forums
If you are having specific trouble and the problem is personally related, then email Hubpages admin directly. I rarely have personal issues, but when I do, I email "firstname.lastname@example.org" and they are fairly responsive.