I received my second call today Saturday Oct 10;
Call 1: ( several weeks ago) I picked up, very rude man's voice telling me he was putting me through to his supervisor, I was left on hold for a few minutes, the "supervisor" was extremely rude and intimidating, however when I challenged and indicated the call had not come up as a "Government of Canada" number and I assumed it was a scam he hung up. When I tried to call that number ( I don't remember it now) it was not in service.
Call 2: I just missed a call today from 1-613-704-2170 so not knowing who it was I called back. He identified himself as Officer Kevin Blake from Canada Revenue Service and quickly rattled off a badge number. He indicated there was a legal case against me. He knew my first and last  name and address and was about to read out the 'legal charges'; again when I challenged him that the number had not come up as a "Government of Canada"  and I was not going to listen to any "charges" he hung up. On reflection it is unlikely one would get a call from CRA on a Saturday and certainly our CRA employees are much more polite! Both calls were disturbing despite the rational part of me knowing it was likely a scam. In other circumstances if I was not fluent in English or perhaps new to Canada and unaware of some of the red flags (no phone ID, rude behaviour, threatening me with legal etc.) I may have fallen for the scam and given out valuable information.
I will report this to the RCMP anti fraud on Tuesday by phone.