Hello Marko and welcome to the forum. I’m afraid you won’t get your money back here. You are asking people who hav lost their own money. You are also asking gambling addicts who know that bailing someone out is the worst thing you can do for an addict – it just lets then continue to gamble.
You also won’t get it back by gambling, you will just make the situation worse.
You are welcome to use this site of course if you want to use it as part of your toolset in stopping gambling. Read the other stories here you will see the sorts of things that have helpd others stop gambling. Speak to your family, they could help you with accountability so that you don’t lose any more money. Connect to the helpline here and they can point you in the direction of support in your area.
Basically you now have a choice. take some of the steps you don’t want to take now, while the loss is $500 or don’t and wait until the loss is much bigger.
I hope you make the right choice. When in a hole – stop digging.