Sorry to hear you had a bad time. We hare happy to help - our official support channel is through the main sites support ticket system - https://www.vintagestory.at/support/
When requesting a password reset - please disable BitDefender, if you have it installed. It silently blocks all requests to our site, for no apparent reason and its the only application that seem to do that.
Also feel free to request a refund through itch.io.