Dona, if you look at the menu at top right of any WikiTree page, click Help, then click the very last choice - WikiTree Team. You can contact the entire team with one message to info@wikitree.com or you'll see individual addresses for each team member. Chris Whitten is the closest thing to the "owner of WikiTree", although he prefers the title "WikiTreer in Chief".
If you want help from a leader (or a mentor, which I suspect you're really looking for), you can select one that you think is likely to have expertise in the area you're working on and send him/her a private message asking for help. I'm sure whoever you select will be very willing to help you. You'll find a link to Mentors under the same Help menu at top right of the page.