parcels going missing - theft

I am a designer who has ordered lights from a great lighting supplier who actually knows a thing or two about customer service. The Courier Guy, however, does not. They have lost a parcel belonging to one of my clients which has created a ripple effect. I am disgusted at this company! They have no shame, no protocols and NO CUSTOMER SERVICE. I WANT MY PARCEL AND THEN I WILL BE TAKING FURTHER ACTION DUE TO DAMAGES TO MY COMPANY NAME