Implanting widget in footer (code html)

[Pascalkid]

Hi all,

I would like to implant our review widget into the footer of our shop (www.thulia.nl).
I have tried several things regarding changing html code, but it's not really what it has to be. The widget link, which has to be implanted, is: 

<iframe frameborder="0" allowtransparency="true" src="https://www.kiyoh.com/retrieve-widget.html?color=white&allowTransparency=true&button=true&lang=nl&te..." width="200" height="111"></iframe>

I really hope someone here can help me with this. I would love to place it under the social media icons.

Thank you in advance.

Pascal Kuijper