i just did and another 613 number as well.

Yes, Major CRA scam. They ask you to call them back and tell you you have been audited by CRA. That you owe money and they want to make you run around town like a goof ball. I did not bite, but they kept me wondering for a while,

Said that there was a warrant out for me from the Canada revenue Agency

The first call came from
Phone type: Wireless
City, State:  Covina, CA
County: Los Angeles
Zip Code: 91723
Provider: T-MOBILE USA, INC.

A guy with a thick Indian accent said to call back 613 703 1613 (no records on this number), because I've been audited by the CRA. That was laughable. Too bad I wasn't home to pick the call.
Two days later, the second call sounded like a machine reader, claiming that the CRA has a warrant on me and that I should call 613 366 3334. That number is registered under:
Phone type:     Landline
City, State:     OTTAWA, ON
Provider:     Fibernetics Corporation

I just got the same call today, saying that they have been trying to reach me for several days and that there is a warrant out on me from Revenue Canada Ageny....I called the number back, but can not get through...It just has a busy beeping dial tone...This is a prank, or something...do not fall for it, because they are trying to get people to send money....