FYI there are only some countries where evidence is inadmissible solely because it is aquired illegaly (eg in the United States, but not most of Europe AFAIK). Not that I in any way condone what this company have done.
[1] https://scholar.google.com/scholar_case?case=107551340662323...
[2] https://scholar.google.com/scholar_case?case=641943334909742...