They sell you promises of products they do not actually have and will not get. The delivery estimate keeps changing and changing until you complain enough that they admit they can't get them.
They always say it's "unforeseen", but considering how often it happens, it is pretty much their business model to hold on to your money by lying and selling non-existent products. They say they ship from Australia, despite being called NZsale, and you have very little way of knowing where you products might actually be, if they exist at all. They also keep advertising products they say they don't have, which surely is false advertising and misrepresentation.
They should not be allowed to operate as they have become a complete scam! Don't waste your time and never order from from them as there is a high likelihood you will never see what you ordered. Avoid especially if you are trying to get presents as you will inevitably be disappointed.