can't access without www after changing domain

[singeryoon]

I'm using free subdomain here.. for some reason I tries to change to co.cc but then the status here is ok but I cant even acces to my page, so I change back to x10.mx, but I can't access my website without typing www. anymore, when I just type my domain I just saw "website doesn't exist" message. help pls.

[vv.bbcc19]

It should not happen that way.If there is any error from server, whole of site will stop working
The reason could be
1.While changing domain, user used A records and in due course did not set A record for www.sitename.co.cc.Then he accessed the site using mozilla firefox or any such browser which caches large amounts of data.But after revoking the urls back to x10.mx, the browser is giving only cache data.
If this is the case, try clearing browser cache + flush dns using cmd prompt and the command ipconfig /flushdns
Then hit a Ctrl+F5 to reload the page.
Try this and revert back if you still face a problem.