I never actually got through to the call center. I almost got there, but the recording said they were too busy and it disconnected the call. It was a Monday, so that sort of makes sense. That is when we looked in the email again and the email message was there. And yes, the email had been in my husband's (the PA) email but he missed it.
To be fair, the email didn't come from "CIC" as previous ones did. It came from "CPCO-FinalRequest / CTDO-DemandeFinale" and the subject line was "Ready for Visa". I think that's why he missed it.
I looked in his email and it caught my eye because it was in both English and French.
So it took about a week after I noticed the DM. I don't know what day the DM was posted, because I stopped looking every day.