Hi Oliver,
Looks like this issue is now fixed? I searched for "24 hour people Priceminister" and "priceminister google plus" on google.fr and your site is showing up as the first result. Interestingly, we are also seeing the same issue for our brand queries on Google since last few months. For us Google is infact even showing the other brand for autocomplete search suggestions as well! See details here: http://productforums.google.com/forum/#!mydiscussions/webmasters/ESDluD9Q0-A
Can you please let me know if there was something you did that rectified the issue or did it get fixed automatically? Any help will be highly appreciated.
Thanks!