Nah, it's a Polish company

In other thread i read that crappy soil isn't reason to do emergency repot, so for now I will just wait and watch out for overwatering. I have also sent message to shop, where i bought that elm. We will see what they think about this. I don't have high hopes, because it was the cheapest bonsai on whole website, but still I like it very much, so I try everything I can to make it happy
Edit: I have found another
thread with problematic tree - same pot, same crappy soil, but totally different country. Probably it is mass imported to Europe from China, it cames with that soil and shops do nothing to improve them a little. At least my soil seems to drain well when watering, but on the other hand stays moist for too long.