Since its past the event, it would be good if you gave us an update. Would be good to know was the ticket a paid upgrade, points or cash booking. If cash I would have thought asking for the chauffeur drive extension its only an extra 30 miles give or take. EK is not regulated by EU261 on the inbound and can choose to ignore and offer a partial refund for the fare differance but you might find its not much. Personally I would be happy I was back home and not stuck in DXB