Hi Gary,
Sorry for any confusion regarding the estimated delivery date. We certainly need to get better at adjusting the date displayed on our site to account for public holidays.
Regarding your blades, despite the public holidays, delivery was first attempted on Saturday the 31st of March. Which was within 2 business days of the day your order was placed. We do try to get our shipments out to our customers as fast as possible.
You can see the progress your shipment made here: https://www.nzpost.co.nz/tools/tracking/item/ET104076838AU
Sorry again for the confusion mate!
Cheers
Sean