A question better suited for the oneworld forum.
They are probably charging you a
service fee which is allowed under the rules.
16. VOLUNTARY CHANGES/REROUTING/PENALTIES
Penalties as described below may be waived in case of certified death/illness of the
passenger or passenger’s immediate family member or accompanying passenger.
Local service fees may apply on rebooking, rerouting, reissue or refund.(a) Rebooking/Rerouting
(1) Prior to departure
(a) Changes to date/time/oneworld carrier/inventory changes are permitted
provided ticketed points remain the same. If the first flight coupon is being
changed, and the fare level has increased since ticket issuance, the difference
between the old and new fare will be charged. If the fare level has decreased
since ticket issuance, no refund will apply.
Exception: For fares originating in TC1, changes to the first international flight
and preceeding flights are not permitted less than seven days prior to the date
of the first ticketed flight.
oneworld.com
Page 9 of 11
oneworld
(b) Changes other than to Date/time/oneworld carrier/inventory permitted at a
charge of USD125.00 per transaction. If the fare level has increased since
ticket issuance, the difference between the old and new fare will also be
charged. If the fare level has decreased since ticket issuance, no refund will
apply.
(2) After Departure
(a) Date/time/oneworld carrier/inventory changes are permitted provided ticketed
points remain the same.
(b) Changes other than to Date/time/oneworld carrier/inventory permitted at a
charge of USD125.00 per transaction.
(c) No Show requires rebooking at a charge of USD125
(d) If the rerouting results in an increase to the number of continents or extra flight
segments previously charged, the ticket shall be recalculated. Ticket may be
reissued to any applicable Explorer fare validating all rules of the new fare
except for restrictions on retroactive use. Rerouting penalty applies when the
resulting fare is less than or equal to the original fare. No refund applies. See
Upgrading provisions when recalculation results in a new fare basis at a higher
value.
http://www.oneworld.com/ow/air-trave...world-explorer
See also a number of threads in the oneworld forum like this:
http://www.flyertalk.com/forum/onewo...light=date+fee
http://www.flyertalk.com/forum/onewo...-my-done4.html