Flightnetwork and Luftansa, flee from both companies, act in a crooked and miserable way, even when paying the change/cancellation service, they force you according to their rules to do so in a limited way and outside of common sense, and if you do not accept, they act unilaterally canceling your tickets unilaterally. The same ones taking advantage of the trust placed in both of them which has given rise to serious and large losses as well as the rest of the collateral expenses of travel, reservations... etc., even so after a multitude of communications and management attempts by, or art, totally useless with the support service of both companies useless and without any success. As well as extraordinary losses of money and time.