Different default page after instalation

After a content installation I got a different home page then is on your life demo site.
Link to the site: http://www.koszulkizeglarskie.pl/
The home page looks like a common blog page. What could went wrong? Or should I change something in configuration?
I checked all downloaded pages and there is no page which is similar to your demo home web page. All wigdets like slider and so on are not used in pages’ templates.

Hello there,

I hope you are doing well today.

Please go to Administration > Settings > Reading and ensure that you are using the static page option for the front page and select the correct page for the homepage.

Best Regards,
Support