Cant link to my page from Facebook, hacked or virus ??

Hello

I have a problem with my site Fullcourt.dk
Some people cant get in to our site, other people can.

Another thing is that when we are putting links to our articles on our facebook page, it simply wont go to our site, and people are getting redirected to google and other funny pages.

Whe tried deleting our htacces file, and update our permalinks. This seems to work for about an half an hour, and then it returns to not working.

I have very small knowledge about webpageediting because i’m new, and would love to get some help. Do anybody know what the problem could be, and what we can do ???