I don't like to hang out casinos, I really don't. I understand sometimes things take time. But this is different.
I had a huge win of 47964 EUR on 22th April. They paid out 20k but the remainder is now sitting in my account, over 6 weeks later.
I'm at my wit's end. They were happy letting me deposit thousands, but when it comes to paying out wins they are not happy.
And it's not even been a back-and-forth. I literally haven't heard ANYTHING for over a month!
Oh, but they're very sorry and understand how I feel - they've been understanding how I feel for over a month. That's all I know.

Obviously we need some more info than just that. What did they say when you tried to withdraw more, or at least what did whatever notification say. From you post alone nobody would ever understand what your story is about, you should know that.
Instead of uploading a picture of the chat support you should upload a pic of the email or whatever notifying you about a investigation (r whatever it is they are doing). This chat pic tells absolutely nothing and also support agents don7t ever give any real info anyway.