Nissan Rim Cap Missing after Service

My husband took our Nissan Navara for a service at Nissan Lydenburg. They checked the brake pads and confirmed that they needed replacement. The vehicle came back with 1 Nissan Rim Cap missing and apparently- they could not find it!! This is unacceptable because the car is only 1 year old, and we are now driving without 1 rim cap!!!!!!!!!!!!!!!!!!!!!!!!!!! Reg KWV895MP! Can we please have our rim cap replaced!