Agree should call. FWIW, I did this about a week ago on flights to Rome that were canceled. The agent seemed to believe that refunds were not available. He put me on hold for about 3-4 minutes and told me he got the refunds approved. I'm not sure he knew what he was doing--refunds for a canceled flight should be automatic, no approval needed. Refund has yet to show up, I may need to call back. He did correctly process the redeposit of miles for a similar situation involving different tickets, and the refund of taxes/fees came quickly.