I got a call from this number. she was a lady and she claimed she was calling from CIC. she was telling me that there are concerns about mine and my husband's identities and if the Canadian Embassy( which she didn't mention in which country) has contacted us.
that was weird as we are both Canadian citizens and I told her that was fraud and asked her not to call again, otherwise I would report her to the concerned authorities as I've heard that many people are getting such kind of calls.

This is a virtual fradulent address used by Indian Scammers. With the recent influx of refugees from the Syrian and Libyan conflict, Indian scammers have chosen this as an opportunity to extort money. You get a call from a pretender citizenship officer alleging a case against your file and demanding few thousand dollars to drop it or you will be kicked out of Canada. In reality, this is just a fraud, dont pay a single cent.
Beware of these criminals.

CIC offices are given here-
http://www.cic.gc.ca/english/information/offices/help.asp

The only office in Ottawa is at
200 Catherine St.
Suite 101
Ottawa, ON
K2P 2K9

Beware off this scam Google it also

Today I got call from 6139576513 claiming they are from CIC regarding a complaint they received about me and my residency. They asked me to send money thru Canada post as a penalty to solve this issue. When he talked money I closed my phone and did not answer his next calls. Please beware of these fraudsters and don't send any money to them.