air duct cleaning service who doesnt care about the do not call list

Guy says he is from 4 Seasons Duct Cleaning.  Hard to understand thick South Asian accent. Calls every few days and CRTC does nothing.  I agree with andon the guy is not concerned about the do not call list nor is he worried about any consequences.  He obviously knows CRTC will likely do nothing.

I am getting a call from this number , can you please help me to stop it?

ENDLESS phone calls from this number.  "Air Duct Cleaning".  Same Indian guy every time.  EVERY single day.  This HAS to be illegal.