If you are on a website builder there isn't much you can do being you do not have access to the background code that controls responsiveness.
Is the theme you are using claiming to be responsive? If so, maybe contacting either the author/dev (if you can determine who that is) or GoDaddy about why the theme is *not* responsive would be the first step.
Judith "It's hard to beat a person who never gives up." ~Babe Ruth