Donald M. writes: Our flight nk615, June 15th, was cancled not rescheduled until the next day. I had a surgery scheduled that next day. I had to rent a car. Could not wait to re-book. We were told we would have to wait several hours for a refund, so it would be best if we called. Well, I have been trying to call for the last 8 hours, and the phone is always busy.