The Launchpad program allows you to save and later on recover an account. In your case, if you already lost an account before getting the Launchpad, then it's not possible to use it to get back your account.
Still - in order to recover your characters, post here with the appropriate data: http://discoverygc.com/forums/showthread.php?tid=97064
You'll most likely get your characters returned to you in a few days (a week tops, not sure).