I am very much in favor of responsible gambling and one of the things I don't like about many crypto casinos is that they don't have responsible gambling features, although if they are non-kyc it is almost impossible to implement them.

As for the case you tell us, we can not check if it is a mistake or not. I can believe that it is a mistake and I can also distrust them, neither would surprise me.

But once they have recognized their mistake and fixed it, what do you expect? That they would give you compensation? As they say in the screenshot, you might as well have blocked their emails.