I've come into this issue of slow post via UBI (Aliexpress Standard Shipping).
I contacted their support via email to ask what is happening (http://www.ubismartparcel.com/en/contact-us). They replied fairly quickly saying my items were delayed and should be in NZ on the 3rd. I'll have to confirm this information is correct but for now I would recommend trying their customer support if you've been waiting long.


