I had a very similar experience on the phone with a IRCC agent last week. When I asked why there hasn't been any update on my online profile despite the local officer giving me exact dates on when I would see an update, the agent told me that I was worrying too much, that they were still working on applications from May 2019 and as a September 2019 applicant I would have to wait my turn. I asked him why they were going through the online applications submitted in 2020 and 2021 instead of 2019 and 2018 and he started getting really angry and told me that he had seen people wait 8 years for citizenship and that 21 or 22 months was nothing which then led to me losing my patience. I share your pain; I have tried writing to my local office too and no response. I waited so long for the test, 3.5 months after the test for the interview, and it's been a month since my interview and my profile is still not complete. Like you, I wrote down every single trip I took with all details, saved all my boarding passes but nobody cares. Every time I call, they tell me that they're working on my language skills. I submitted my IELTS results, along with my undergrad transcript from Canada when I was applying so who knows what they don't like. I teach and do research for a living so it's getting to a point where I feel so humiliated hearing them tell me that they're still working on my language skills. Anyways, I'm hopeless, hope you'll hear something soon.