Hi, I have had a good experience with mine, I know that's not what you want to hear, my experience was went to the dealership they took photos and depth readings said they would be in touch, heard nothing for about 4 weeks then a phone call to say they had ordered the parts and where going to book me in the following week, when I asked about cost they said it would all be done free. That's 2x front wings, tailgate around the VW badge and drivers side sill repair.
From what I gather more often than not its the dealership that delays things and can ask you to contribute to costs etc. The dealership I went to had recently been taken over and they told me that before they changed they where doing everything full warranty all paid for half VW goodwill and the rest topped up by dealership, since they changed ownership they hadn't tried to do any warranty work so said I might end up paying towards it. In the end though I didn't and was happy with everything even the paint colour matched, as that was one of the things that would of bothered me if the wings where a different shade to the rest of the car.
My advice would be try another dealership or if people can recommend there dealerships perhaps may help. Circumstances can change with the dealerships especially if they have to contribute but in your experience even if you went elsewhere and had to pay say 25% cost that would be better than £1200, even better if you don't have to pay. Even if you had to travel and it cost say £50 petrol to get it done free that's gotta be a worthwhile expense.
Anyway i'm rambling now but hope that helps.
