See if you can get a Rescue or Notification email option. Link to contact Apple Support at the end of the 2nd article.
Apple ID - Manage -
Apple ID – Forgot Password *
If you are being told there isn't enough information to reset them, contact Apple ID Support.
If you don't know the answers, if the steps in the article below don’t work, contact Apple ID Support, although based on multiple posts I have read, they will not help you recover the answers to your security questions.
Apple ID - If you forgot the answers to your Apple ID security questions. *
From the article below.
Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.
Security and your Apple ID. *
Apple ID - Official Apple Support. -
Contact Apple for help with Apple ID account security - Apple Support. * (Link doesn't always load)
Get Support - Work through the screens to get a chat option.
Apple Support schedule phone call. -
Apple on Twitter
See if anything here helps.
Solution to the forgotten Apple ID security questions. -
See the Apple Support article(s) below.
If your Apple ID is locked or disabled - Apple Support. *
If you have changed your ID or password, have you followed the steps in this article? Make sure you turn of Find My Phone before signing out of the old ID. Once signed out and Find My Phone is off, then sign in with the new ID, then turn Find My Phone back on.
What to do after you change your Apple ID or password - Apple Support. *. I suggest you do this before changing the ID and/or password.
If necessary, contact Apple ID Support for assistance. See the Apple Support articles below for contact information.
Apple ID - Official Apple Support. -
Contact Apple for help with Apple ID account security - Apple Support. * (Link doesn’t always load)
Get Support - Work through the screens to get a chat option. You may have to pick a slightly different problem.
Apple Support schedule phone call. -
Apple on Twitter
From the Apple Support article below.
Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.
Security and your Apple ID - Apple Support. *
