Originally Posted by
Ragnarok
I disagree.
The passenger paid a certain amount of money for the change.
The airline, at the end, did not provide what they accept the payment for, the change.
The passenger ended up in the same flight they originally booked in. Hence, the goods / service that the customer agreed to paid for, have not been provided, as the merchant agreed to.
The change they paid for was made. UA can easily win the dispute by sending the CC company a copy of the revised eticket.
Another change was also made, uncompensated, as allowed by the CoC they agreed to.