I do hope you find a way to recover your money but upon a quick search, there are a lot of red flags about it.
https://casino.guru/dash-video-casino-reviewThere is no live support with them and purely anonymous without licensing so it would be hard to rely on them. I hope you can manage to get what you deserve.
I have been playing there for years. Never had an issue. From what it looks like issues started last summer, they would fix it and they would come up again. I hope they fix it right this time.