How can I unlock my Apple ID when I don't recall the answers to my security questions?

So my original apple id is locked for security reasons.it takes me to a place where i can unlock my account by either sending an email to that locked apple id or i could answer the security question. I dont remember the security question at all and ive seen some videos where it tells the person to add their phone number but that option NEVER comes for me . i need some help how else can i recover my apple id ?

[Re-Titled by Moderator]