We booked on Air Canada on points and were put on United as a code share, we would have much preferred Air New Zealand, one of our favourites. We "upgraded" to Economy Plus, our mistake, we thought that was Premium Economy, United does not offer that. No matter what question you asked any flight attendant the answer was "I don't know" Had no idea the entertainment system did not offer music (what airline does not have music?), had no idea what the meals were.Halfway through the fifteen hour flight I ent back to order a drink and a snack as it was suggested we do. I asked for a cheese and fruit plate, again "I don't know if we offer that" Are you kidding? Its in your menu! After a discussion between Flight Attendants and a search of two galleys the cheese tray was found.By the way, the dinner was disgusting, even by airplane food standards. Could not even tell what we were eating. LA to Melbourne why are they serving Grits and Collared greens?? Had to read the label to see what I was eating. We fly a lot and love it. We returned in first on the way home, much better, but still not the friendly flight attendants we are used to having. Next time to Australia we will either avoid flying through LA or insist on a good Airline lIke Air New Zealand. Since our return I have learned that Air Canada now flies to Melbourne, started just after we go home, darn.This is the condensed version of our flight, there was more.