The government website where you register your phone numbers on the DNC has a page where you can report numbers that repeatedly call. I've received a few of these. Oddly enough never on my house phone, but always on my cell (which is also registered on the government DNC). Telemarketers all have access to the government's DNC list, but if they actually use it to call people, they face major fines, so if you find you are getting calls, go to https://www.lnnte-dncl.gc.ca/index-eng and "File A Complaint". I kept getting calls from 000-000-0000
on my cell phone, and reported it - I don't get those calls anymore. I'm going there now to file this 888-111-1110 as a complaint... and check that my cell phone number is still registered.