IME, UA will stonewall and spew carefully chosen language to avoid incriminating themselves while denying EC261 compensation, ultimately leading to a ."kiss off" message in which they assert the "matter is closed." Much like the health insurance industry, they know that a significant portion of claimants will grumble and moan but not pursue further. That's what I did on previous occasions but this time decided to persist. I tried every possible route before finally going to a third party. Matter is currently in process. I looked at several, chose to go with
flightright.com as they were recommended by several sources.