It seems no update on the case yet.
They still have 5 days to respond. Don't always believe all these scam accusations coming from forum accounts. I used to take these seriously and used to think the sportsbooks and casinos are the bad actors but in many cases it became obvious that sportsbooks and casinos are in fact the victim of these abusers. They found an easy way to come here in the community, put pressure with the help of forum members and perform their dirty job.
That's why it's important to evaluate each case separately and objectively, putting aside any love or hate you might have for a user or casino that is involved. A sportsbook who is spending thousands of dollars in marketing to get clients, it makes no sense for them to scam someone for $4k or even $40k. A decent size casino and sportsbook spend more money than this in a single day.
I somewhat agree, but don't forget, those marketing investments need to be financed somehow. 
If the casino refuses to discuss the case publicly and goes through a mediator that decides against them, that's the only proof we have that they are wrong. Same thing if the mediator sides with the casino. Since they won't share any information publicly in 99% of the cases, there is no other way.