This flew under the radar for me. Was not aware but have just heard thanks to a reader. Submissions are due by the 2nd of February this year 2018!
Go to this link to find a submission form, easy as. You can tweak it for your own needs & email to the address provided:
http://www.stopsmartmeters.org.nz/latest-news/template-submission-on/
There is also a facebook page on this issue at this link:
https://www.facebook.com/Save-Our-Landlines-NZ-1626155717464225/