What is your next step?
Regardless of what Sportsbet really believe what happened, you cannot expect Sportsbet or any other online casino to accept any form of liability in a public forum, it will open them up for mass litigation. they could have privately engaged with you in a different more sympathetic manner but from what you and they wrote it seems they decided against it.
What next for you?
sportsbet.io have replied with the response I was expecting, unfortunately because I reported it to Curacao eGaming that is now their response.
It is however clear from this case that as a company you have no regard for the welfare of your players and absolutely no commitment to maintaining a responsible gambling program.