.sadece-bilgisayar{
  display: block !important;
}
#wh-widget-send-button{
  display: none !important;
}

@media only screen and (max-width: 600px) {

  .sadece-bilgisayar{
    display: none !important; 
  }

  #wh-widget-send-button{
    display: block !important;
  }

}