Emailed a complaint to Air Canada and got a surprise gift in the mail

For context, I was travelling home to Toronto from London Heathrow last December and got terrible service from the check-in desk. Was travelling economy with Aeroplan 100K Super Elite status but the person at the service desk redirected me to the Economy check-in desk until I showed proof of my status. It felt like some kind of profiling. I sent them an email just to give some feedback about the service I got and I was surprised to see this passport holder, leather bag tag and pen + a full letter acknowledging my claim and apologizing for the bad experience. Pretty great attention to their customers and was surprised to see a response via mail.