On a device: Go to iCloud > Devices. Select a device and press Remove from Account. online: Create an account at apple.com/icloud, login, then go to Manage Account > Manage Your Privacy > Request to Delete Your Account. Choose a reason, agree to the conditions, and provide a new email address?
Keep in mind that if you delete an Apple ID account and any associated data, it’s permanent and irreversible. You will no longer be able to access any of the content or services listed below after your account is deleted by Apple.
You can’t delete an iCloud email account from your ID once it’s been established. You don’t have to use it for email, though. To remove the account from your devices, go to Settings>iCloud and switch Mail off. nOnce created, you cannot delete an iCloud email account from your ID.
You can’t. As previously stated, deletion is irreversible. That AppleID and email cannot be used again with Apple as login credentials for any of its services.
Open Settings. Select Users & Accounts, then your account. Select Subscriptions from the drop-down menu. Choose the subscription you want to manage, then Cancel Subscription.