Haha I got that CRA call a few months back. Little hint to these people to run their scam better. Don't be calling from a California area code. CRA most likely will not have a guy who barely speaks English calling you from Cali. Was good for a chuckle though.
Been getting a ton from the states recently. They hit my # 3 or 4 times in a row from the same US #. Really looking forward to them calling when I can actually answer and screw with them.