Select TV (or Live TV if you are on a version lower than 15.2 and if you are then consider updating)
You will now see a pop-up saying that you have no PVR Client enabled. Select OK
Scroll down and select PVR IPTV Simple Client
In General select M3U Play List URL
Copy the URL you received from us and paste it into the address section highlighted and select OK
On your Home Screen you should now see TV (or Live TV if on an older version of Kodi). Open that to see the live channel list
Select a channel for it to load and play.
The PVR Simple Client should now be setup with live tv streams available.