Faulty Clutch Plates
Clutch plates that have to be replaced on a low mileage bike still under warranty must be replaced free of charge under the warranty.
I suggest you have your bike serviced elsewhere. Your dealer appears to be useless and you shouldn't have to be chasing after Ducati UK to stump up for the cost of the work.
Some members seem to be rather reticent when it comes to getting mechanical problems sorted out on bikes which are still subject to the manufacturer's warranty