Terrible decision from Flight network..I had an ac...

Terrible decision from Flight network..I had an account that archived all my trips for the past few year. The account suddenly VANISHED. I keep records of everything otherwise I would have no proof that I had a cancelled flight with Lufthansa in May. Flight network referred me to a third party for my credit but they are not acknowledging my booking with Lufthansa who is doing the same. Tripple scam!!!