Sorry to hear about your situation, but a lot of applicants get their LOAs late. It’s very unlikely for IRCC to rush these applicants over those who apply earlier. Because if that is the case, then IRCC would have a big headache as they would not have enough time to review each applications. In this case, they would have to just approve each application without review, thus messing up the system. Non-legit student applicants will take advantage of this and Canada will have a huge number of illegal immigrants in its hands.