Keep track of all the numbers you are getting called from - make a list and then contact the Police and the Governments' DNCR - and report them.  It may be it is the same people calling - but using different numbers.  They are not unlike the computer hackers - but if you don't know who is calling you from the number if you have call display - don't answer it.  Make note as above.

These idiots have called my house way too many times.  And every single time I ask them to take my number off their list, they hang up on me before I even have a chance to finish my sentence.  They are rude and inconsiderate, even after I tell them that my number is on the CRTC do not call list.  I've made a complaint against them to the CRTC, hopefully it won't take too long to have rectified.  In the meantime, I've blocked their number.  Hubby made a good suggestion though, next time they call, make an appointment to clean the ducts and then when they show up at my door, I can personally tell them where to go, maybe that will be my new approach to these rude and annoying telemarketers.

(416) 700-5678 I receive Daily calls from this number, 3 rings no one on the other end! Frustrating!!

They have called so many times, Air Duct Cleaning Service...each time I tell them I am on the do not call list and they hang up.  UGH!!!

These idiots called my unlisted number.  The first time they called, no one was on the other end so I called the number back.  Got a recording saying I could leave a message and it was forwarding me.  Then I got another recording saying that the voice mail box was full.  The second time, there was a person on the other end.  It's a duct cleaning company.  I told them to remove my number from their list.  We'll see what happens.

Just launch a complaint at https://www.lnnte-dncl.gc.ca/plt-cmp-eng if you're registered with the National Do Not Call List.