Here is a list of various resources and supports which is regularly updated by the MoH.
Christchurch Central Service – Alcohol and Substance Support
Often I use a range a mindfulness, meditative and ACT type courses and Apps. Here are a couple which I have found to be particularly useful.
Mindfulness Works https://mindfulnessworks.co.nz/
Worthy listens (by Tara Brach) https://insig.ht/CxGX3FIh8ib
Smiling Mind (child focused) https://www.smilingmind.com.au/
Waking up by Sam Harris