Change email of apple id

Have you tried going to the email provider's web site to see if there is a reset password option?

To change your Apple ID email, 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.

what basic email are you speaking of? When you create an apple ID your email is the apple ID. Back in the day you had to create an iCloud in order to have access to APPLE but they did away with that a long time ago and only us OG’s have an iCloud email still.