Can you post your bet history so that we can have an idea whether you can gain any edge through multi-accounting (I am not saying you did)?
In my humble opinion, if there is no possibility of gaining any edge or circumventing betting limits, then the original poster must be paid in full, and after that, it is up to the casino in question to allow him to play further or not.
There’s no need for that. The casino already claimed that the OP has other accounts and even asked them to provide a list, implying there’s more than one, since it’s called a list. Also, I don’t think Rollbit would reveal the accounts or IPs used, as that would likely violate privacy laws, and they could face penalties for doing so. That’s why having a mediator is crucial in this kind of situation.
I think what he meant is if there’s no questionable bet that gives him advantage through multiple account such as arbitrage betting then there’s nothing wrong of having multiple account.
I’m not familiar with Rollbit ToS however multiple account shouldn’t be a big deal of there’s no abuse on his end or circumventions on any restrictions.
But we all know Rollbit will not flagged an account for multiple account if nothing is wrong. So it will really help if betting history will be available.