Originally Posted by
flyerCO
Call them up. Point out there's a lower fare for your flights and you want to rebook them using the lower fare. If you truly have a refundable ticket then they'll refund the difference.
However I would look at the receipt to make sure the notation NON-REF isn't on it close to bottom. You're fare classes just give me cause for concern. Especially the C+ portion.
AFAIK all A and G fares are nonrefundable, as are some but not all P fares.
In fact, even if the ticket is refundable, it might be refundable only with a fee, so that it's really only partially refundable and not fully refundable.