I can't comment on the conduct of the attendant at Auckland.

However with respect to the hotel and missed flight, what some of the others have stated before me holds true. If the connecting flight was also EK or a code share flight, they will provide you with accommodation and meals. However as this is a 2 tickets on two separate flights, they really do not have the responsibility.

What happened was unfortunate, but take it as a good lesson learned. I would advice if you need to arrange for similar flights always buy travel insurance which covers flight delays, and/or give yourself at least 5~6 hrs (better to have a over night stay and take in the local sights) transit time to factor in the unforeseen.