Hi! So great to see a fellow Russian here!
I find GCMS notes to be most helpful as they are super detailed. I ordered mine on Feb 3, 2021 and received them on March 4 so they were pretty much on time. However, that was not the case for a lot of people on this forum and the difference between your and mine situations is that I am in Canada.
Option b - contacting IRCC via webform - was a total waste of time and effort for me personally. They replied, I believe, in about 3-4 weeks with totally useless generic email "don't worry, we're working on applications as hard as we can with the reduced capacity..blah..blah..blah".
I also heard and read that you shouldn't contact IRCC before 180 days deadline, but again lots of people on this forum even contacted them waaaay before the 180 day mark, and not even once. They don't reject your call/inquiry based on the application date.
I'm not sure if my reply was in any way helpful but I really hope it was