I am trying to change the dates of travel on a round-trip from San Francisco to Bodrum (Turkey) on Turkish Airlines booked via Orbitz. The fare rules are somewhat ambiguous in that they include at the very beginning:

NOTE - TICKET MAY BE UPGRADED TO TAFP RULE 4605 H-AP3M TYPE FARE PROVIDED THE FARE DIFFERENCE IS PAID PLUS A CHARGE OF USD 150.00.

but then a number of sentences later say:

CHANGES BEFORE DEPARTURE CHANGES NOT PERMITTED

My (naive) interpretation is that the first clause gives me an out of paying a fare difference and a penalty to change the ticket to a different fare basis, but Orbitz is interpreting the latter sentence to be trumping the earlier one and not letting me make any changes. That really doesn't make sense to me because the fare rules already say that changes can be made after departure with a simple penalty:

AFTER DEPARTURE CHARGE USD 150.00.

Can someone who has more experience with fare basis interpretations give me their read of the situation?

Thanks much in advance! The full fare basis is included below.

Berend


Fare basis code: KKWAP1MN
CANCELLATIONS BEFORE DEPARTURE TICKET IS NON-REFUNDABLE. NOTE - TICKET MAY BE UPGRADED TO TAFP RULE 4605 H-AP3M TYPE FARE PROVIDED THE FARE DIFFERENCE IS PAID PLUS A CHARGE OF USD 150.00. PENALTY DOES NOT APPLY TO INFANTS UNDER 2 YEARS OF AGE NOT OCCUPYING A SEAT. AFTER DEPARTURE TICKET IS NON-REFUNDABLE. CHANGES BEFORE DEPARTURE CHANGES NOT PERMITTED. NOTE - CHANGES ARE PERMITTED TO DATE OR ROUTING OF DOMESTIC TR SEGMENTS WITHOUT PENALTY. IF THE CHANGE CREATES A CHARGED STOPOVER OR INCREASES THE FARE-ONLY THE DIFFERENCE MUST BE PAID. AFTER DEPARTURE CHARGE USD 150.00. NOTE - PENALTY DOES NOT APPLY TO INFANTS UNDER 2 YEARS OF AGE NOT OCCUPYING A SEAT. ------- CHANGES ARE PERMITTED TO DATE OR ROUTING OF DOMESTIC TR/US SEGMENTS WITHOUT PENALTY. IF THE CHANGE CREATES A CHARGED STOPOVER OR INCREASES THE FARE-ONLY THE DIFFERENCE MUST BE PAID.