I have been in C-check since Jan24 as well :(.
What is the best time to order GCMS from CBSA and CSIS? I guess waiting for at least six months is reasonable.
Did you get notes from CBSA and CSIS, as well? In one of the post, It is mentioned that CBSA sends the file CSIS so you can see it in CBSA notes. Btw, waiting for 22.5 months seems to be quite enough time for considering Mandamus.
I guess you have already got GCMS notes from all agents and you got contact with your MP if you are inland. Mandamus might be a solution if the time is extremely long but 15 months might be considered normal before Mandamus. Btw why do you think CBSA is the place you stuck? Would it not be CSIS...
Did you ask for GCMS notes to ensure that you are in C-check? I have just get my notes which is shown I was put in C-check (A34) at the the same day I have seen this note in the tracker.
Eligibility was updated in progress in the beginning of December and completed in two weeks. Dependant BG completed jan24 and mine returned in progress. Asked for GCMS notes two weeks ago, hope to not in comprehensive BG check.