Just curious as to whether or not you scoped out the situation BEFORE entering into business with a Polish, for that matter any foreign, company using local contacts prior to the deal! Without sufficient knowledge beforehand of either local lingo or business customs, you could be screwed!
Sorry to be so blunt, but in your shoes, I'd contact a bilingual Polish-English lawyer ASAP and use a certified or experienced interpreter at ALL business meetings with your Polish interlocutor.
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