Changing Apple ID Email to another one, used previously with another Apple account
Over two years ago (in April 2022) I have deleted my old Apple ID, to which my personal e-mail address was associated. I got the confirmation e-mail from Apple Support that that Apple ID was indeed deleted. Since then I've been trying to use that e-mail instead of the one that I am using currently. I've read there might be some grace period before I can re-use my main e-mail address, so I waited patiently, but it's been over 2 years now, and I still cannot re-use that e-mail address. Whenever I try to change it on my iPhone it says that it is being used by another account.
When I try to reset password to that supposedly-deleted account, it says that "This Apple Account is not valid or not supported."
Has anyone encountered similar issue? Am I doing something wrong? Is there anything I can do besides contacting Apple Support directly?
UPDATE: I selected wrong device - I am using iPhone 11 Pro with iOS 17 now.
iPhone 8 Plus