Service Icons - Custom Vector Images?

How can I use custom vector images for my Services page, I don’t know how to make it work. I tried to upload the image to wordpress and then placing the link/shortlink into the area that says Service Icon in the Services section however it doesn’t show on the website.

I got it on my own, made a custom font set on then used ftp to upload it into the the theme. From there I went and changed code in fp-services.php from <i class="fa ’ to <i class="icon ’ and got it to work.