Yes Montreal office..and let me call ircc for this matter, do you have any contact or extension for quick call?That is a good question. I guess your office is in Montreal, right?..
In your case, you don't have any proof of receipt on IRCC's behalf of your Portal 1 email. I would resend them a second reply and if nothing happens, I'd try to call IRCC and ask them about your case.
I have read several cases like yours, it would be good to know how they solved this inconvenience.