I have opened up a ticket with them 3 years ago due to a problem that I was sending LTC into their BTC address. <...>. It have been 3 years already and I still not able to get my coins yet.
You're kidding, right? 3 years? First of all, you've already been told that if it's your mistake, you don't usually get it back, so I don't know what you're expecting after three years. But then again, the casino doesn't have a very good reputation around here, so if you haven't got anything in 3 years you can forget about it.