Go to the Koodo Mobile page and click on "Manage Your Account". then log-in to your self-serve account. There you can add the BlackBerry Social add-on. With BlackBerry Social you will get unlimited access to Facebook, BlackBerry Messenger, Windows Live Messenger, Twitter, plus more.
You can also add the feature by calling Koodo Mobile, although it would cost you $10 for customer rep charge. If you do it through self-serve, adding a feature is free of charge.