Apple sends identification code to a now defunct email address so I am unable to enter my current email address. therefore I cannot access my account.

Note the restrictions in the article.

Apple ID Name Change.  * 

 What to do after you change your Apple ID or password - Apple Support  *  I suggest doing this before you change your Apple ID or password.

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  *      

I have waited a long time for Apple support NADA

The defunct email is still linked to my account