Rollbit had been here for how many years, they did have a good reputation and recognition on crypto gambling space. Issues might raised up but its impossible
that they would be locking up some withdrawals without any reason. If they've been telling you to comply something or wait then there's nothing you can do
but to do such thing.
@OP, have you already contacted out with those above recommendations?
I do understand the stress and frustrations that comes with situations like this but I think Rollbit has been a reputable member of the family and also runs two separate campaigns on the forum, considering how much they spend on advert and publication, I don’t think they will run with your money even if it’s a $50k, so what I will advice is that you try reaching them over here on the forum as I think you’ll get a more faster response from them and if you have proves, it will be much more easier for you to resolve whatever issues you have with them.
Goodluck and also do well to report back to the community when your issue gets resolved atleast to clear their name of every evil your post must have portrayed.