Near Side Air Deflector

[sagart]

roger.mcdowall@btinternet.comC5 Vtr diesel estate, bought new in May 2004...my second one.
On 3 occasions this year the near side air deflector pt. no. 7013T3 has separated from the underside of the car, hit the road and been severely damaged, requiring replacing.
January 2005/ April 2005/ August 2005.

Today 13th. September it happened again requiring vehicle recovery by the RAC and the remains removed by a garage.

At no time has this happened after any accident or road incident - since I bought this, my second C5, to enable me to take out my severly disabled wife I am less than happy to own a car which appears only too willing to shed its underside for no reason.

My dealer insists that the part is correctly fitted which implies the fault lies with my car, but will take no further action. Can anyone, please, advise on action as the part needs replacement and I have no confidence in the Dealership over this matter.