So I made some more research and found out that 1xbit scammed people before like that. I wasn't aware of that. It's kind of my fault that I trusted them blindly and didn't research them enough, I take that.
They have been scam people from day one and the various complaints and scam accusations online is more than enough evidence that they are not to be trusted. there's nothing much you can do now except learn a lesson not to just trust any service online. First research about it and verify.
It seems like I will never get the money I won back, they stole it. They are really bad people, stealing from others with no guilt. At least I managed to withdraw my initial deposit before they scammed me. It sucks because I felt so happy about my winnings and thought about many things I would buy on Black Friday. I feel helpless and hopeless, yet I kind of know nobody here is able to help me.
Yeah, looks like that money is gone. It surely sucks. Hopefully your review will help another innocent user out there who tries to do some research.