I don't think I've heard of them before and they've not been mentioned on the forum much?
They have been in this community before,
Rocketpot.io Signature Campaign(CLOSED). But it was 3 years ago, so we really don't know what happen to them, but it seems they are inactive in this community. Their official account is here:
TheRocketman is also not active, which make some of our suspicions that they might respond to the allegations.
I was a member of that sig campaign back in 2019 for a week or two and I remember that I created an account there, but the website was really slow and my browser kept crashing. The overall experience wasn't great, but at least they paid me my earnings.
Anyway, this sounds like the typical "I've made a lot of money, but the casino won't give them to me." story. I've seen this many times before and rocketpot.io isn't the first casino doing this scam. This is what you get after betting big amounts, using too many bonuses and being extremely lucky.
Move this thread to the Scam Accusations forum. Maybe you should call a lawyer, but I don't think that rocketpot.io is ever going to pay you 170K.