Without an ADR, the accuser could only relies to the licensor if Rollbit didn't answer to that thread --same situation for OP of any other future cases. I might will ask the same question you asked here on that thread if they ever replied there again. Thank you for this.
I see it as a big flag not wanting to disclose such information. In that case, I can only recommend that players get in touch with the licensing institution directly and ask them what to do next. In Rollbit's case, they operate under a Gaming Curacao (GC) license.
The official website and contact form unsatisfied players can fill out is below:
http://www.gaming-curacao.com/#section-contactYeah, feel free to ask Rollbit Razer the same thing if you think it will help to find the name of the service.