Sorry to hear that you are experiencing this issue.
I checked this on your website, but the form was no longer loading on my end. Upon further checking, I observed a JavaScript error in the browser console.
As this is a live website with traffic, please create a staging website and perform the test without disrupting the live traffic. A staging website is a copy of your live website in a new directory on the same server using a separate database.
Please update us here with the results so that we can help you further.
I’m still seeing everything here on my end. This is generally a problem with the Speed Optimizer plugin at SiteGround… I just disabled everything. Try now to see if that helps?