But I didn't received confirmation email.i applied 26 Dec 2023
You're saying AR, not AOR. I'm not sure how to claim that you haven't received an AR.
(I'm not sure calling IRCC works when you're before AOR. Maybe only solution is a webform?)
AR means the confirmation email
right after submission whereas AOR contains that the application is now being under process.
Especially non-EE applicants don't have application number(s) immediately after submission.
Also every GCMS note requires the application number which is indicated on AOR email, not AR. That's why GCMS is available after receiving AOR.