Content Just Dissapeared

Hi

Could someone help me out, my content just disappeared randomly out of the blue the other day but the header and menu is showing. I can see it when I’m in my admin panel when I turn on the themify builder. I tried deactivating all the plugins and it didn’t make a difference. Then I tried changing to a basic theme, that also didn’t sort the problem out in fact it made it worse, all my customization for my previous theme has gone and my email sign up form is no longer connected.

I’m using Themify Ultra Theme Basic, my site is http://www.kaanfitness.co.uk I’m quite newbie so I need really basic step by step instructions.

Thanks

Adam