Originally Posted by coolcoil

The way I read this section it seems to me it should be possible:

...REPRICE USING CURRENTLY TKTD FARE
PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET-
1. NO CHANGE TO FARE BREAKS
2. WHEN NO INTL COUPONS REMAIN - ALL NEW TRAVEL MUST
BE DOMESTIC
3. CM FARES ARE USED
4. NEW TKT HAS EQUAL OR HIGHER VALUE THAN PREVIOUS
TKT
5. ALL RULE AND BOOKING CODE PROVISIONS ARE MET
6. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO
DEPARTURE OF PRICING UNIT
OR -...

I read this as the first option is to reprice with currently ticketed fares as long as the 6 conditions are met. I'm not sure what #1 means. It could be interpreted to mean that if any fare changes, the conditions are not met and you go to the next set of rules which do require you to reprice at the fare available that day. I think conditions 2 to 6 were definitely met.

Of course, I am not at all an expert in this field and we are not looking at the actual rules for the particular ticket in question, but this gives me reason to think there is a small chance OP may have a case to argue.

However, I still don't hold out much hope. Unless the OP can positively show the CC company that CM was in the wrong, I expect them to side with the airline. The easiest way to go would be to file a DOT complaint as DOT would have access to the rules and understand what they mean.