change apple ID

Do you mean that you cannot sign in to appleid.apple.com with your old email (i.e., current Apple ID) in order to change it using the procedure in Change your Apple ID - Apple Support

Note that the fact that email is no longer valid with your email provider should not matter.

See: Change your Apple ID - Apple Support

What is the error message you get when you try to change it? If not available, normally, if your e-mail address was associated with an ID in any way, for example as a Reachable at or Rescue e-mail address, then it can't be reused with another Apple ID for approximately one year. I have also seen posts that stated Apple told them there was a 30 day waiting period before the address could be used again. You will need to get another e-mail address to use as your Apple ID or you can try waiting 30 days to see if that works.

 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.

You are welcome.