Apple ID account locked.

i have an old apple id my clash of clans is on and i’m trying to get into it and it’s saying my account is locked and telling me to put in a phone number and i don’t have that phone number anymore that apple id was made almost 6 years ago now so what do i need to do in order to log in and get my clash of clans back the email i’m referring to is ***

[Email Edited by Moderator]