is their anyone at duo lingo that I can telephone to ask about the problem I am having with the site
Duolingo is a free site that does not offer a telephone helpdesk.
Instead we have this forum, where other users and moderators try to help with any problems.
ETA: I just read your earlier post. Does the next row of skills still not unlock for you? Have you tried logging out and the re-logging in?
I don't know what the Italian tree looks like, but shouldn't there be a Basics 2 skill next to Phrases? You'll need to do that before you can move on.