From what I gather on these forums it's pretty common with any visa office to not hear things for a long time. December 21 is barely 6 weeks ago. Some Visa offices don't send out AOR2s. Have you completed PCC, Schedule A, and your Medical Check?
I presume that you are an October Applicant because you are posting this question here? You're still well within normal processing times and trying to get in touch with the Visa Office or IRCC isn't going to speed things up.
The more people request information by e-mail or calling (or even ordering GCMS notes), the more it takes the staff and officers away from actually working on the application, so there's a reason why IRCC and Visa Offices are so hard to reach. Ultimately it slows the process down for everyone if too many people impatiently contact the offices just to get status updates.