Ok problem solved. They delete shop from http://www.ballooncompany.eu/. Problem was not selling product but delete "powered by Quick.Cart" and they replace to "powered by NameOfTheirProduct" and change link to their site
Can someone translate this: u plugt de USB stick in op uw computer en u kan meteen aan de slag.
Tranlation: Plug the usbstick into your computer and you can start immediately