A travel companion of mine fell victim to a Qatar schedule change on a business class flight OSL-DOH-BKK/BKK-DOH-OSL. Her connection time at DOH on the outbound became 20 mins - less than the MCT. Qatar said they won't do anything as it was booked through GoToGate. Upon contacting them, they moved her onto a slightly later flight, but in the process the outbound sectors dropped from I to W (economy). GoToGate say they can't fix it because there's no availability in I on the new sector, so they need Qatar to authorise moving her into the J bucket. Qatar are saying the agent must contact them requesting the change.

Given that both the agent and the airline are shrugging and pointing at one another, what can I do to fix this for her?