Solved, received the money all ok, 31.96860000 BTC.
But still sad about situation and idk should i play there anymore, hope they will solve all problems with payments.
It is a *huge* amount that very few sites carry around in their hot wallet - so I'll give Rollbit the benefit of the doubt here.
Besides, this did get resolved quite efficiently even though there was a bit of a delay. It could be a genuine concern on their end for the legitimacy of the bet.
If anything, I think Rollbit has proved themselves to be more trustworthy as a result of this prompt resolution. Kudos to them.