If you want to remain on the waitlist, you should send an e-mail to uottawa by tomorrow, as tomorrow is the deadline to respond.
An Admissions Officer confirmed with me that, since files have already been scored, the admissions committee will not be looking at anymore supplementary files, including new grades.
The mockery's a bit uncalled for, I think. I know people who have serious anxiety issues, both in law school and elsewhere. And even though I've tried to understand what it feels like, I've undoubtedly come up short a few times. But apparently they get pushed into downward spirals really easily.
Considering what the table stakes are now, the amount of money that is dumped into this degree, the ever higher chance of not getting articles, at the very least I would hope that established lawyers wouldn't be making fun of peoples' feelings and worries. Sheesh.