If you haven't had any communication from them outside of the AOR and ITA, then it's likely you don't know about your UCI (which is usually at the top of the messaage).
In such cases, I would strongly advise just calling them up on their number and speaking with them to ask for the same.
The phone number to call is: +1 613-944-4000
Pay attention to the IVR system, choose options correctly and eventually they'll put you through to a representative.
Call post 9:00 AM Ottawa time and be prepared for wait times as long as 20 minutes and hope that you get a good, happy and cooperative representative, too.