the haulier who delivers the goods on behalf of SD...

the haulier who delivers the goods on behalf of SDA at the location of my work located in the San Pietro area of Rome is very rude. every time he comes to deliver he doesn't want to wait for my colleagues and I to go down and sign. raise your voice and make jokes too heavy (ex: ... next time I'm parcel I throw it in the middle of the road ..... or ... but why don't you take it to your home? ...) now when I shop on the internet I notice what kind of courier they use. if it's the SDA I don't buy. I hope the SDA headquarters will intervene.