Duct cleaning telemarketer

Air duct cleaning.  They phone us daily from different numbers which we have now blocked.  They actually have phoned from all these numbers and if you try and call them back it says disconnected.  I am on the do not call list which does not work, and there seems to be nothing I can do to get them to stop calling.
1-866-389-8751
1-800-505-5525
1-254-125-8758
1-360-633-9006
1-905-342-1223
1-905-267-1263
1-905-698-0108
1-647-932-6339
1-416-277-1688

We've been getting a lot of annoying calls from duct cleaning companies. They called at 9:30PM and asked for the homeowner. I said they were not available and asked if he realized he was calling at 9:30 and he hung up. I am also on the do not call list.

Have had 8 calls in 4 days over this holiday weekend. I'm assuming it's the same company using different numbers. Some Indian guy who couldn't speak a word of English so I can't figure out the name of the company. He did say duct cleaning. I'm also on the "Do Not Call List" but I'm guessing it's another waste of government resources.

I never never answer calls I do not recognise .... I have call display plus an answering machine ...  if the call
is important they will leave a message......  I can then screen and decide