They delivered!
They delivered. It took a lot of time, but that was because of the airline. FlightRight sent me updates from time to time so I knew they were still busy with my case. In the end they took a 30% fee + VAT, which totals to 36% of the claim. It is serious money, but on the other hand, without FlightRight I would have gotten 0 and now I got 64% of what I was entitled to. I would definitely recommend them.