They deleted the game and started over 2 years ago. Your cards are gone for good. They gave you scraps but if you had premium cards you wont be getting the powder back. It happened to all us so dont feel singled out.
Join in The Witcher universe’s favorite card game! In GWENT, you clash with your friends in fast-paced duels that combine bluffing, on-the-fly decision making and careful deck construction.