In order to disconnect your Wantedly profile from your Facebook account, you will need to delete your Wantedly account and register a new account using your email address.
You can delete your account here: Delete account
It can take up to a week for your account to be deleted. Please note that deleting your account will erase all of your information and is irreversible.
If you are still having trouble, contact the Wantedly Customer Relations Team from here!