Fraudulent calls for telecom promotions

I've been receiving 3-4 phonecalls per week from call centers where the caller is always Indian and they're all calling about a special promotion from one of the big three telecom companies.

I actually registered my phone on the no call list from the federal government. I'm not even a customer of the big three. (Videotron in Quebec ftw) So I shouldn't be receiving these calls. I've also asked multiple times not to be called again. But they still call.

Has anyone else had this issue? How did you deal with it?