Nor4,

You should be entitled to a refund. The $275 charge would only apply had you attempted to change your booking prior to flying, and has nothing to do with claiming a refund. If you don't take your flight, no matter the reason, you are entitled to your taxes fees and charges back, though most airlines charge a refund administration charge which in this case is $35.

If you like, I can take a look at your case for you. I work for a company that specialises in this area. Just check out our website, it's in my About Me section in my profile.

Best of luck,
Daragh