If you want to unlink your account from Steam, send an email to support@ryzom.com. I haven't used Steam so not sure exactly how the Steam payment system works.
Currently once you subscribe an account you cannot go back to a free account. The Ryzom team is investigating changing that to allow the account to be usable when unsubbed, but with limitations.
Currently once you subscribe an account you cannot go back to a free account. The Ryzom team is investigating changing that to allow the account to be usable when unsubbed, but with limitations.