It sounds like you don't have any trusted device and thus can't use this:
If you forgot your Apple Account password - Apple Support
But make sure you have looked it over.
We are then into account recovery:;
How to use account recovery when you can’t reset your Apple Account password - Apple Support
You have to know both the email of the account and you have to know what the trusted phone number was (even if you dont have access to it)
If you dont know what the trusted phone number is you need to test with any number it could be.
If you can't find what the trusted number was at all. you can't recover your account.