If ALPA really told anyone to pay up in this regard then they are as incompetant as the Rosair financial directorship !!!
If any lawer asks you for money , after you tell him to go
himself, please quote the following phrase,
"SCEPTIO NON AGEMPLETI CONTRACTUS"
IE, BY rossair being liquidated, you as an employee were unable to comply with the terms of yor contractual obligations to the company, as Rossair and the liquidators are unable to comply with their obligations to pay you, end of bloody story.