Sorry to say that is one of the Rival casinos who have gone AWOL...

They opened specifically targeting the French market in September 2010, but had disappeared by the end of 2011.
Payments SHOULD still be made by Rival -
but you wont be able to contact them direct as they wont talk to players or affiliates.
They still owe me some commission payments from April...!
I think all you can do now is wait... and pray.
KK
{Edit to add} You MIGHT be able to Pitch-A-Bitch as they aren't specifically named on CasinoMeister's "No Mans Land" listing. But this is only because that list of white label Rivals is not up-to-date doesn't include of many of the new ones who opened in the last 18 months or so.
Worst you could do is PM Maxd and ask him...