You list a whole string of issues but the basic one is you need to deal with the security questions before being able to reset the password in order to get your account unlocked in order to be able to update your app, and so on.
You can try the directions in this support article If you forgot the answers to your Apple ID security questions - Apple Support
but note that the article is labeled "archived" and may contain information that is out of date. This can also be because it is a feature Apple no longer supports.
If you cannot reset the security questions (e.g., “not enough information”) then realize that several years ago Apple transitioned to using to two factor authentication instead of security questions. Apple has since been persistently encouraging users to switch to the newer security system and your next recourse may be to try to change to two factor authentication as outlined in this article --> Two-factor authentication for Apple ID - Apple Support Follow the instructions in the section "Turn on two-factor authentication for your Apple ID"
If that does not work, contact Apple ID support at this link ➞ https://getsupport.apple.com/?caller=cups&PGF=PGF63005
Select "Other Apple ID Topics", then "Security concerns or account compromised." This will give you a chat or telephone call option. Realize though that you may not be able to regain use of this account and will have to create a new one. Good luck!
