Us visa passport pick

Hi.. Behaf of my friend..
He done his interview for spouce visa
In london us emmbussy... Got visa confarmation.
They give him web adderess fone number
Arrange currier to send passport he set up
Delivery but cant arrange send passsport
They ask for send autorized he been to
Everywhere call them maill them but cudnt
Get sort...
Is there anyone please help how he submit
Hes passport for his visa service..
Any weeb link .. Phone number.. Adderess..thanx