Poor assesment by claims department

Claim for replacement of clutch master + slave cylinder was declined, even though these items are clearly listed as covered in the policy. Dotsure's reason being that the damage to these items were "caused by" the clutch plate (which isn't covered). This after I waited 10 days for reply to my claim submission. I would like to move my policy before i'm told that my turbo claim is declined because it was caused by the air passing through it (which isn't covered).