Originally Posted by
NYC Flyer
Technically speaking, any ticket can be refunded. The airline could process a refund if it sees fit, or the travel agency could process a refund and potentially be subject to a debit memo if the fare rules state the ticket is not refundable (which I'm 99% certain is the case here). You're correct that REFISSAGY means the issuing agency must process a refund, assuming one is permitted.
I don't think the OP will get very far with the argument that since the endorsements line does not specifically say "non-refundable" in some way, a refund is due. However, the documentation supplied at the time of purchase assuring passenger the fare WAS refundable would be of more use to fight this.
Actually (at least for a ticket without REFISSAGY) a ticket must be marked NONREF otherwise it is refundable. If OTA issues ticket without it, technically the ticket is refundable. If passenger demands it, airline will refund and charge the OTA due to incorrectly issued ticket.