(418) 832-9420 "INFRAS INTL"
Some opinion poll in French.
Unfortunately, their harassing IS LEGAL.
Just gently tell them to put you on their own do-not-call list for both Infras and the company they do their dirty work for, then gently hang up.
To be sure, add this number to the shitlist (many VOiP companies, such as Primus, have a telemarketing guard and/or a Concierge service. Use it wisely. Or use your own PBX.)