Site is not appearing???

Hi. I have a website using your Highend theme and for the most part, I’ve been updating a few pages that haven’t gone public yet and out of nowhere, my site started to appear blank everytime I tried to access it. I can’t even login to the WordPress dashboard or access the login page. It is not a server issue according to my Host and they claim that its a WordPress issue. Can you please give me some feedback on this because it turns out that this has already occurred for more than a day. Thank you

Website URL: arimednow.com