I see you did order the gcms notes a few months ago - order again.
Go back to your MP: with more specific questions. In many/most cases, some steps like police checks, info sharing, etc., are started earlier. (Most MPs are not that helpful first time, some are never helpful, but you should expect that first time trying won't be).
If you can't get answers you want, you may need help to do so. You might also re-apply but wouldn't do so without more info.
you seem to have contradictory info about whether or not it was sent to mississauga - gcms notes should say where the physical file is.
We can only guess at this point, and my some-what out there guess is that your file is buried in a very large pile and they actually don't know where it is and will only get to it by working through many more files. That doesn't give you much info on what to do next, however.
Good luck.
