In this case, please contact the pharmacy where you ordered or place a separate order for the potassium preparation.
Prices of sample products can be compared here and ordered with home delivery or collection at a Polish pharmacy:
https://www.gdziepolek.pl/produkty/63353/potazek-kapsulki/apteki
https://www.gdziepolek.pl/produkty/96594/solgar-potas-tabletki/apteki
https://www.gdziepolek.pl/produkty/63334/olimp-potas-tabletki/apteki
In cities such as Warsaw, Wrocław, Katowice, Kraków, Lublin, Gdańsk, Łódź, Szczecin, Białystok, Poznań and Chorzów, products can be ordered with instant delivery in as little as 1 hour thanks to the Wolt Drive service.
https://www.gdziepolek.pl/koszyk/szybka-dostawa?src=zf