Snolus: I've never had much luck with Twitter in general, though I try to avoid it if possible. How does that usually go for you?
Sometimes I get a reply and sometimes I don't. Just as with FB I only use such platforms to be able to get in contact with devs/publishers (so no personal information anybody would have a use for). It's not possible to contact Focus via FB so I chose another contact method. I also just added a support request on their main page as well. In my experience the best chance to be successful is to use EVERY possible way to contact ... and sometimes do it multiple times. Still no guarantee of course.
Snolus: Please see
this thread for achievement related stuff, though I think Alexim is already aware. :)
When I read the post about missing achievements I too thought that there was an extra thread but looking at the OP it was not mentioned but the list for missing achievements was posted there so I thought I was wrong. Maybe this should be added to the OP as well?