Plugin changed my website after uninstalling it

Hi! After installing the free version of the plugin I found out that this plugin was not what I was looking for. When I uninstalled the plugin I noticed that it had changed the mobile version of my website. My website went from “okay” to bad.

Is there a way to change my website to how it was before I installed the plugin?

The page I need help with: [log in to see the link]