I totally agree with everything that Trish has said.
Good luck. I hope she is reasonable about it.
I'm not sure what I would ask for in regards to 'compensation' for a lesser model.
Would you be happy for her to pay you the repair costs only? Or do you definitely want a partial refund as well? Are you able to get an idea of what the non-Elite models are being sold for on eBay? Can you then come up with a figure based on what you actually paid? Is there a big difference?