Please note that most people posting here do not work for Apple, we're just unofficial volunteers, users like you, trying to help others. We can only advise you on what you can do to help yourself.
"If you forgot the answers to your Apple ID security questions" click here --> https://support.apple.com/HT201485
If you see the message "not sufficient information" read this link:
Security and your Apple ID - https://support.apple.com/HT201303
"Without proof of your identity via a temporary Support PIN and other carefully selected criteria, Apple Support can't help you perform any actions on your account." Unfortunately the solution they offer using a temporary PIN also requires knowing your security questions answers... Catch-22.
With that in consideration, "Contact Apple for help with Apple ID account security" click here --> https://support.apple.com/HT204169 If the online option does not resolve the problem I suggest trying to get a personalized response with a chat or telephone call. To talk by telephone: Contact Apple for support and service - Apple Support --> https://support.apple.com/HT201232
For other support options including those if your country does not have telephone support: https://support.apple.com/choose-country-region To chat, choose any topic, (not Apple ID) continue working your way down options until you find one with chat support, then ask to be redirected.
(Note: If your country is not listed, there may be a support option at the end of each region section for "other".)
It may ultimately prove very difficult to find satisfactory resolution to forgotten security questions (e.g., https://discussions.apple.com/thread/252410816 ). Apple is very strongly urging users to use Two Factor Authentication instead of security questions. --> https://support.apple.com/HT204915