Yes I think the hacker might be Vietnamese. I do spend time there, and have accepted a few requests recently. Very frustrating as FB have zero interest in helping me or get my account back, despite me uploading ID as requested etc etc
Last resort posting here. Been locked out of Fb for a week now, someone had compromised my account (poss hacker had added another recovery email, which I changed). My account has a two-stage login security but I can't access the (old) phone number to get the code! I keep filling out their FB...