Ended up fixing that issue. Was ajax issue but not with Google, just loading it off bjmb it wasn't using https (which I've switched the site to), so AJAX wasn't loading, which does the quick reply and thanks without leaving the page.
So I've managed to change the load url to https, I have no idea why it didn't change with everything else.
The last issue when the site was down it just seems we get so many requests/bots that it took it as an attack, so blocked traffic, which blocked almost all traffic. Although an okay sized site, there are tens of thousands of sites that handle more visitors than this site so I don't see why they're having such an issue with it.