Air Canada stinks. Its rotten. Its terrible. I would rather fly on China Airlines than take them. Staff are rude, phone lines are always busy, they never respond to letters or comments. I have sent three letters certified mail over three years and have never received a response. They are also TERRIBLE with returns and lost luggage claims. I would rather waste three hours to fly on UA than to take a direct AC flight. Its not suprising that so many airlines are having trouble.
If you win your claim please share with the rest of us. Perhaps we can learn from your experience.