Hi OP
What a kerfuffle for you.
Just to tell you the same thing happened to me with a BMW 3 series estate when it was taken off the scheme and my factory order went adrift.
I spoke to Motability and they absolutely can change a factory order to a stock one in certain circumstances – they did it for me – they said it happens more often than you think – don’t believe everything you read on the internet.
Stay calm and polite and I’ll keep my fingers crossed for you.
Dave