No, it doesn't work that way. See, you don't want anyone who gets access to a computer you're using for a minute while you go to the bathroom to be able to change your password and at the same time change your email address, do you? So the system mails a confirmation request to your email address, the one you gave when you opened the account. You can change that address but only if you know your password, or you can get a new password but only if you can use your email account.
If you can't access that account any more the only way out is to call Spark at 1SKS during business hours. Is there any way you can convince him you're you?