Porter is awesome, except if you run into a problem such as a delayed flight. I simply wanted to get a letter from their customer service for my insurance and it took them 2 months, while harassing them. If you are looking for their customer service address:
Porter Customer Relations
Billy Bishop Toronto City Airport
Toronto, ON M5V 1A1
Tel: (888) 619 8622
Fax: (416) 203 8150
customer.relations@flyporter.com
But first, use their online form. Then, when they do not respond, contact them through other means for them to answer your original request.