You must uninstall the zap2xml addon from Kodi and then install the zap2epg addon. I have it working on my RPi3 with the latest OSMC updates.
You will also have to copy the tv_grab_zap2epg to the /usr/bin folder and chmod to 777.
Follow the prompts in the addon to select the channels to download and then restart.
Go to the TVH website and change your channel information with the new zap2epg information.