You didn't set an email?
Then it will be troublesome to restore since you can't request for a Wallet ID reminder.

Also, it seems like they'd set the aliases of no-email account as "insecure" years ago: /index.php?topic=305625.msg3275271#msg3275271
Even if it's years ago, as the quoted email said, their customer service may help if you can provide enough proof of ownership (minus the password).