Admired theme not totally responsive

I am relatively new to WP and totally new to this forum. I have had a look on the forum topics and don’t seem to be able to see anything related to my issue, which is:

I am using the Admired Theme and for a website rather than a blog. Mostly things are OK but when I checked the site on my Android phone I found that my Menu was not responsive in that it did not reduce in width for the phone. Also, the main body of the text did not reduce in width although the text did.

Any suggestions please are most welcome,