xs++3.1 can also read/write gdfs try to restore your gdfs with the back-up,
wotan probley had no effect on your erom cause you were already cid:52 it wouldn't upgrade any more.
try this Upgrading or repairing the EROM (FOTA) in phones CID 49 or CID 51 with Phone XS - Top Sony Forums
then a full flash main fs & custpack