Lost of weekly abyssal dungeon entry

I was in a abyssal dungeon before the announcement of server maintenance and we were going through and learning mechanics so when the server went down we just thought it’s going to be fine we can just clear the next day but to find out the weekly entry was used. Is it possible to refund or warn others about this because it would be terrible to lose a weekly entry due to server maintenance, game crash or any other crashes whilst being in a abyssal dungeon.