Keyword Cannibilsation issues

My site appears to be suffering from keyword cannibalization because our main keyword is part of our company name. Let's call the site [*thefoodhamperhamper.com*](http://thefoodhamperhamper.com), with 'Food Hampers' as our main keyphrase. Upon reviewing the source code, I noticed that every page on the site contains 26 instances of the term 'Food Hampers,' while the homepage alone has 56 instances. I want the homepage to be optimized for this keyphrase and prevent other pages from competing for it. However, after two months, Google Search Console shows that traffic is still being sent to the homepage *and* 13 other pages for this keyphrase. How can I signal to Google that only the homepage should rank for 'Food Hampers' and not the other pages?