This is how is correct

https://prnt.sc/nBEfrZvQ_7Se

and screenshot of google maps

https://prnt.sc/11owJIgyz5h1

is a problem with your browser. Please double check before screenshot

Hi

The pin is not correct and is not showing the right position on Google Maps which is used like API on web site.
This is the location on Google Maps

google.com/maps/place/Dnevni+dečiji+boravak+Moj+Svet+NS+-+Centar+za+edukaciju+i+unapređenje+učenja+-+Novi+Sad+-+produzeni+boravak+za+decu/@45.2552057,19.8036982,20.63z/data=!4m14!1m7!3m6!1s0x475b11c9ea7420b1:0x69a6b494d97b0f89!2s28,+Bulevar+Slobodana+Jovanovića+18+,+21000,+Novi+Sad+21000,+Serbia!3b1!8m2!3d45.2540748!4d19.8039849!3m5!

The same location is on the website, please clear a cash of your browser or open it in incognito mode and open link again

https://www.mojsvetns.com/location/

Hi Branko

Please give a look carefully and on location on page

https://www.mojsvetns.com/location/

Is clearly address is in Novi Sad , not a Belgrade.
If you have other information please share with us