You may have no choice, ethically and legally, but to go through the 'official channels' in raising your concerns, but you would be foolish to assume that this will work. Whistleblower protection in Canada is virtually non-existent at present, so following official procedures rarely helps and often makes things worse.
You should therefore work on the assumption that you will eventually have to resort to other methods in order to expose the wrongdoing and to protect yourself. This is where the media and investigative journalists can be extremely valuable. Going to the media is not a magic bullet: the press is not your ally, your story may not be considered newsworthy, and inappropriate publicity can make things much worse for you.
However, a trustworthy investigative journalist can be your best possible ally, and in some cases we can act as 'matchmakers', putting the whistleblower in touch with the right journalist.