PJ, I appreciate that you sought clarification, but I'm afraid for me that clarifies nothing.... 😞

If a product has been purchased and not supplied by an Australian based trader (not a private seller), the consumer is entitled to a refund.

If a seller sends something, have they not supplied it? That doesn't confirm when delivery is deemed to have occurred, and doesn't say that a buyer has to have received something before a seller's obligation is ended. 

I don't see anything that really makes what is deemed delivery clear, and I would have thought it would be easy to say, hi, you (or the other person on eBay) is right, delivery is deemed to have occurred at such and such a point....but it doesn't seem like they did that?

And if the OFT are happy with buyer protection, I assume that means they're happy that a seller can send something via C&S, but in the event it isn't received, as long as the seller retains the correct documentation, the buyer has no way to recover their money from the seller.