Apple ID PROBLEM! IF u could help pls read desc.

Hello! I think this site doesnt deal with ios problems but oh well! SOOOo Ive got this old phone from my mom frinds so- its like very old oh well sooo this problem made smth - her friend and mom interepruted the conversation. So on this phone always appears a reminder and its so annoying!it says that the Apple id is not verified BUT i litteraly dont have the phone number the gmail just nothing!I cant use the iCloud thing and it talked me a lot of space!!

I just need the password or reset it but idk how! Idk if someone will respond cuz this is a Apple Id problem but ive tried oh well...