I had to cancel my bookings with Insanely Cheap Flights because I did not realize the flight was in USD. My mistake as its posted all over the website when booking. Anyways, I called the customer service line and someone picked up after two rings. I guess other people have been calling during the high volume times.(I called in the morning) The guy on the line was very friendly and tried to find me a cheaper flight for the times I wanted, but after not being able to find anything, cancelled my flight. He waited on the line with me until I confirmed the cancellation via email, and he then confirmed the cancellation on his end. VERY helpful. Too bad flying in Canada is so bloody expensive!