Got numerous calls from that number,  purportedly about a legal case against me.  No details on the case,  other than a that that I would be the only one to suffer the legal consequences should I not call them at that same number. Of course,  nothing actually happens when I don't call back other than another annoying phone call.

Yup... Same thing happens with me

same

Case against you, call right away or face consiquences

And when you call back they answer revenue Canada
Then in his thick Indian accent oh no we don't to that this is revenue Canada. Like I'm stupid I was trying to get him going then he said f**k you and hung up