It would be great to get some kind of compensation from them. But it seems to me that everything is exactly for this, they are only happy that I lost everything)
The bottom line is that one cannot expect to win at gambling all the time, so there's no point in crying over spilled milk now. Lesson learned.
If your story is true, you gambled with your 300 DOGE, and from what I understand, you managed to withdraw some funds. So, all in all, you are not at a loss.
There’s a two story behind this one and we only know the first story, so its hard to speculate but if its a true winnings then that is really good since its not easy to hit a good multiplier on any casinos. You still have that winnings just know how much your capital is and you’ll be fine.