That does not seem right. To access a channel, an email login is required. You can check this guide that may help you regain access: https://goo.gl/q2Ijwz . Also, share your channel URL for us to take a look. Keep us posted.
Thanks for the info. But to regain access, you'll need to have at least one of the account related info. If you have a recovery email address, here's an additional guide that may help you regain access (it covers more scenarios): https://goo.gl/q2Ijwz . Hope it helps!