Change Apple-ID for iCloud without knowing my password

Dear community,

during setting up my iPhone 5C I created two Apple-IDs:

- one for iTunes (my mail address)

- one for iCloud (one address that was recommended by Apple with "@icloud.com" at the end)

Unfortunately I forgot the password for the Apple-ID used by the iCloud. Through iForgot I can reset the password. Email authentication will be sent to the "…@icloud.com" address. Because I have no access to the mail address anymore, I cannot reset the password.

Is it possible to delete the Apple-ID created for the iCloud and use my normal Apple-ID instead?

Until I don't know the password for "…@icloud.com" anymore, I have no idea how to delete/change the Apple-ID for iCloud.

Would be glad for any help.

Best regards,

Silver