The guy who stole the hashes is not the sites dev. He doesn't work for the sites. He simply was put on teamviewer to fix some things with the server because he knows the game code very well and he screenshotted the master seed. They are simply attempting to strong arm a payment out if us. If it was a legit win, they would have been paid. It's fraud. Nothing more.
That sounds even worse. Outsiders being "simply [...] put on teamviewer" on a production server, what could possibly go wrong
Everything about you just screams utter incompetence.
the site owners know I didn't cheat
You had the seeds and you won high-risk bets. How would they know that you didn't cheat?