I left my friends game then joined it again and all my player progression and everything was deleted even my level.
This is an ongoing bug caused by 2K’s servers. Please file a ticket on their forums. They are currently trying to fix it.
Which website and how
Idk man, google is your friend.
If anyone gets any new updates let me know, but as it stands now, 2k claims we cannot get our levels back. Happened to me too, sorry man.