Plugin messing up mobile view

Hi, I used the plugin to change font of my website to Open Sans and increase the font size for different sections by creating font controls which I screenshotted below:

I then edited the font size for each control in the Customizer theme typography section. This has resulted in my mobile view getting messed up. I had to re-upload my theme and deactivate all plugins to trace the issue to Easy Google Fonts, as the mobile theme skewed once I activated this plugin. A link to my site is: https://goo.gl/r1h0z5 and I am using ShopIsle theme.

I have also attached a screenshot of the mobile view problem below but you can also look at it from the live site.

Thanks a lot and hoping for a great solution to this issue.