After the recent channel changes full EIT EPG data is not available on several channels - only now/next.

"My guess is that during the recent lineup changes, some engineer has
managed to turn off the full EIT data for the TVNZ and Discovery muxes."

( from MythTVNZ mailing list forum)

I know that full EIT EPG is not actually part of the specifications for NZ
DVB-T transmissions - (full EPG data is only promised to be available
using MHEG5) At the start of DVB-T transmissions, there was only
now/next EIT data. It was a good few years later that they turned on
full EIT data and it was working up until the recent lineup changes.

Can someone please advise how or who I can ask for this to be "fixed"?