Major page loading issue on website, please help

Hi Guys,
Starting last week, one of my sites starting taking about a minute to load the home page and 30 to 40 seconds to load any other pages. Previous to this it worked perfectly. I’ve had 3 calls with the hosting company to ensure it is not them. I’ve tried everything you outlined in the sticky thread about problems since the update. Updated WordPress, Theme, and Plugins, I’ve disabled all the plugins, cleared the cache, cleared the browser cache, deleted the plugins, added the java script code to the php file, nothing has helped. Can someone please have a look to see if there is a configuration issue or a problem with the update? All my other sites use this host and the enfold theme with the same plug-ins and none of them are having problems. Login details in the private section. Thank you.