Website not functioning properly

I’m having issues with my website. Google is being blocked from fetching my site completely. I contacted my website server, and they said that the issues are not on their end. When I pull my site up, the page will come up but I’m not able to scroll down. Only the top part of the page shows. My website server support said that it may have something to do with the htp.access files. They said that it looks like they have been altered. I have never altered those files. So, I don’t understand how that can happen. I posted yesterday about this issue, but didn’t get any response. I’m posting it again because this is very urgent to get my site back up. My seo ranking is steadily declining and my ppc campaign got canceled due to the site not working. I don’t know how long my site has been messed up. Also, the images that are blocking google are associated with my facebook business page. I don’t understand how they can be blocking google when they aren’t even on my website. I do have a link to my facebook business page on my website homepage though. Please help.