No access to an old Apple ID due to incorrect information The Apple ID which is linked to my iPhone can't be accessed. I have tried 'Find my ID' but it won't accept my birthdate and emails are not being received to any of my current or old email addresses.
Contact Apple Support, as they are are able to access and recover account details - something nobody outside of Apple can do for you.

Be prepared with any information you might have. Helpful details include (but are not limited to) current/previous addresses, credit card information, and purchase receipts that are automatically mailed to you following any (app/music/movie/etc) Store purchase.