I did a Starbucks chat on this 3 years ago as a mini-EF event and covered these topics amongst others.
Generally if you don't receive interest pretty soon after applying, it's likely they're only focusing on tracking the applicants they're interested in.
Remember Swiss business culture might have a different view of "Obligations management" similar to their "Obligationsrecht" legal system than what you might intuitively expect.
Think of it as something like "just because you apply, doesn't mean I owe you a reply because you unilaterally contact me, unless I asked you specifically to". This is why the unemployed on RAV benefits, need only prove they applied for jobs, not that they received a reply/rejection.
Second if you're applying through a third party, maybe your application isn't going further, and all they think they owe you is the automated acknowledgement you mention you've received? The "target" may feel they owe you nothing as they technically didn't hear from you directly.
Also hiring these days has a lot more to do with networking than in the past. An inside track is invaluable. Bear in mind recuiters headhunters here tend to recruit based on matching a position to an applicant, rather than finding applicants a specific position in their network of vacancies/contacts.
Personally I was fortunate that an agent kept with me once until our third position success together based on my previous "good applicant" performance. However it took a year (luckily I wasn't unemployed). He wasn't Swiss, and the Agency wasn't based here either.....
Are all your application materials consistent? Is the flow of your CV consistent with your profiles on LinkedIn, Xing, Facebook etc.? Being a premium member will tell you how often you're being checked out.....Important also is some 360 degree references online to bolster your career history.
Finally are you doing any voluntary work with any insitutions that could benefit from what you have to offer? An ex-colleague of mine got work after volunteering in the local professional organization chapter of his profession due to the contacts he was able to make at the organized events.