account no longer valid
I have what used to be called an "iTunes Id" which was mail@student.gsu.edu. Obviously the email address is no longer valid, and I have mail@icloud.com as my primary iCloud ID now. All the apps and music I purchased with the old iTunesID are not available because whenever I try to verify that old ID, I get a message saying either that it is locked for security reasons, or no longer valid when I try to unlock it.
[Edited by Moderator]
iPhone 7, iOS 15