I got a call yesterday , saying something about free services 'sur l'anniversaire de mon cabinet' ie of setting up my business. I didn't understand it all except they made sure I got a pen and paper to copy down a number to ring Mme Sophie. Her name was suspicious enough and I just hung up. But they rang back and insisted I was missing out, hung up again after saying je ne suis pas interessé. The number was an 089 number and would no doubt have cost me many euros.
Though I'd warn you all.