Calls at least once a day. They almost never leave a message. The one message they did leave was a woman saying "This is harassment" as if she was describing what it was she was doing. Weird.

Got call for them, doing airquality survey, said i won a prize. I'm betting is vacuum cleaner people, going to show me how their vacuum cleans my air .....

23 calls in two days from this outfit.

They called me once two days ago and three times yesterday. All four times they stayed on the line after getting my answering machine. I could hear someone breathing (not in a creepy fashion, just breathing) and some activity in the background. They hung up after 10 seconds or so each time. Very strange.

Call & complain to this Gov link
https://www.lnnte-dncl.gc.ca/pfplin-fccoin-eng

Telephone survey, purportedly about air quality, although few questions deal with actual indoor or outdoor air quality issues. Caller identifies self as Ivan, company as Sterling Solutions, doing survey in Edmonton and Calgary areas. Says you may get a call back if you have won a prize for your participation. VERY STRANGE - likely scammers or trying to identify homes they can break into.