Can you tell us what info did you use without providing specific details? (e.g. what category, sub-category, what combination of ID did you use, whose UCI did you provide (sponsor or applicants or co-sponsor), whose passport details did you provide; # of applicants you entered for your case (in our case my wife is sponsor, i am co-sponsor, and we are sponsoring our in-laws; we have three kids also; so not sure if that number should be 2, or 4, or 7!)
I am in the same boat with application in mid-nov and no communication whatsoever from IRCC till now. I am also not able to link the application using GCKey.