Correct - for now only EK1/2 are operated by A380. Perhaps once all 58 aircraft are delivered they will be in a position to replace all LHR operations with the beast.

Its also my understanding that EK do not charge a 'premium' for their A380 flights compared to those 777 flights on the same sector. Therefore there shouldnt be a monetary refund to speak of except for one of having to lower your expectations