I'm from Canada too. I received 3 phone calls from them in one month. So when they called yesterday, I called them back. But I was so pissed off, I gave them absolutely nothing from me.
I was yelling the whole time.

I asked the person to send me by the post the proof of the charges of my lawsuit to my home adress and i want my envelope sealed and stamped by Revenu Canada. Then he hang up....
When I was still speaking/yelling.

And I did my research, I checked for the phone numbers of Revenu Canada. Then I checked on Google like some of you, Florida. Haha...I will like working for Revenue Canada in Florida.