Making galley reel fit for mobile

Site URL: https://www.thelivinghouse.co.uk/

We have added a reviews gallery section onto our home page however when on mobile it cuts off the image slightly and how do you change the content width for desktop side so you do not have a large bored around the images? 

We have already used code to make a space between the images  > .gallery-reel-item img {
    left: 10px;
}

Please see images attached for examples

Can anyone please help? 

You mean show full image without cut off like as current?

Hi @tuanphan thank you for looking at this. 

Yes it would be useful to know how to make the image not cut off but also to decrease the border size around the gallery, where the mustard yellow is so the height of this section isn't so tall. 

Can this be achieved?