Mobile Friendly Column & Menu Settings

Hi! My site is not showing up well on my mobile phone. I have a page set up http://www.avasure.com/events that looks greats on desktop, but the columns are all messed up on mobile.

That page also doesn’t show the menu options when I click the three lines at the top, but the other pages do. Can you help me fix this? I attached a screen shot for reference and the page is http://www.avasure.com/events