Display of 3 images (desktop = Horizontal) (Mobile = Vertical)

Hi,
Following our conversation in live chat today, im creating this post to try resolve the issue of displaying these images properly.

What i need is for the 3 horizontal images to only display on desktop devices

Then the 3 vertical images will only display on smaller screens and devices such as mobile phones and tablets.

i was given this code from @Predrag Dubajic which seemed to do the trick but also affected the CSS and broke the page design modifications we made earlier, i have remove this code for now but still need some help to make this work.

@media screen and (max-width: 760px) {
#post-424 .spinimagerowtable {
display: none!important;
}

website: http://tinyurl.com/kl7grg3

support access is open

Related posts:
https://premium.wpmudev.org/forums/topic/3-images-on-home-page-display-change-for-mobile-devices#post-870952
https://premium.wpmudev.org/forums/topic/editing-home-page-while-keeping-images-hidden-from-desktop-web-browsers#post-867132
Thanks

Tom