You could request your money back from the school, but that is about it. They might be nice enough to give it back, but, then again, they might not. There's really nothing much you can do about it. Well, at least you learned an important lesson, though it came at a high price.
Realistically, Poland is not a viable option for you, so focus on getting a quality education either in your own country, or, if you can afford it, in a richer country in western Europe or an English-speaking country. And study something that will get you a job, not something like business, economics, finance, law or international relations. Good fields to study are fields with lots and lots of advanced applied mathematics, like petroleum engineering, geological engineering, biomedical engineering, financial mathematics, financial engineering, econometrics and actuarial science.
The best predictor of your future earning potential is the number of advanced mathematics courses you have taken. We live in a technocracy, and math means money. Non-math graduates are in much less demand.