Update.
I made a deal with GrandRio Casino on May 10. that I cancel my complaint and GrandRio casino starts pay me 500€/week. They managed to pay me once. After this no payments. A lot of lies thou. Example they said they have paid. And after a week, they said there is some bank problem, they will contact the bank and so on. Only contact what I had was skype. Last time they replied me was 29.6.2016. They said they will try re-open the casino but:
"The main obstacle we face currently is that the previous director doesn't want to transfer our administration rights and obligations, that leaded our company to start the case and to hire advocates. The problem is still being settled and besides, the other important issues that is being checked by our managers is whether our company is still registered in Curacao or not. I will keep you in touch."
Curaçao eGaming won't help me with this case, because they said they have not licensed GrandRio.
AskGambler does not know who where the real persons running this casino. They emailed me, that only contact information they know is on this site, where is only supports email address.
Now I have tried to find who are the people running GrandRio Casino. I asked NetEnt, Evolution Gaming and Microgaming. Evolution Gaming does not answer my emails at all. NetEnt said that they cannot legally help me, because my win was from Microgaming slot and I should ask Microgaming. I have sent about 30 emails to Microgaming I have only got one response back when I emailed them the information what NetEnt said. Microgaming said that they don't know who where the people running GrandRio! They said, that Microgaming games where re-sold to this casino by company called Mirax Management Ltd. I cannot find this company from internet at all! Now I have tried for a week to contact Microgaming that they could give me some contact information to this Mirax so I could find out who where the real persons who owed and managed GrandRio Casino. No answers yet.
So it seems that you can run Internet casino, get to certfied casinos list in AskGambler, run the games of NetEnt and Microgaming Jackpot slots and no one really knows who you are!
Lack of support from Microgaming was problem in the first place. In April GrandRio Casino blamed that Microgaming is investigating my win and that is reason why GrandRio is delaying my withdrawal. I contacted Microgaming multiple times and tried to ask is this true. They have not answered my questions at all. I still don't know was Microgaming really investigating my win.
When I played Microgaming Jackpot slot and waged about 100 000 euros on that slot I had trust that there is security if I win something. Microgaming would help me to get my money out from this casino. I have not had any help from there. About that waged 100 000 euros few thousand euros probably went to Microgaming through the jackpot?
If some one can help me here, for example give me information who are running GrandRio casino and if I can get some money out based on that information, I promise that I give 25% of that money to the person who helped me. GrandRio Casino still owes me 20 500 euros!
I have still few ideas, where I could find these people. GrandRio Google user has few persons in his Google Circles and GrandRio has Facebook friends. I have feeling that trails go to Russia, because the Skype contacts location was Russia. 20 500 euros is so much for me that I at least need to know who where the people who ripped me off.