You came here to complain about a plugin developer that has been around since 2003, has over 12,000 positive reviews on wordpress.org, used and praised by many just because they didn't respond to you? And because of that, you can't trust them?
You really need to relook at your situation and approach this a different way rather than coming here and complaining without any details. Are you using premium or their consultation program? Their premium account gives you access to their support team on plugin USAGE while their consultation (which cost $2500) gives you actual consultation on SEO.