With any mass fraud campaign, whether it be tied to an instance like this or just in general, people need to have a strong sense of skepticism and take action to protect themselves. There are many resources under the Government of Canada, with such organizations as the Canadian Anti-Fraud Centre and Get Cyber Safe, that provide a list of advice for Canadians. It simply comes down to protecting your information and having a good sense of doubt when somebody is calling you. If it's a bank calling, call your local branch and use your local number. Don't respond to the number they provide and don't immediately call back the number they provide. Go with your trusted sources to validate any questions that are coming in.
I have experienced calls similar to yours. I had a very convincing call from my own bank. I contacted my bank and they gave me the advice that it was not legitimate. It was interesting, because in the end it turned out to be legitimate, but we all felt very safe in the fact that the appropriate steps were taken. I would rather risk not getting a service than compromising my identity or my financial information.