I was picked up curb side at San Francisco airport heading to Hotel Whitcomb, downtown. My cab driver put my suite case and duty free bag in the trunk and we started off. When we arrived at the hotel I did not exit the cab right away, as I was fillin out a three part credit card statement because the cab drivers card reader was broke. The cab driver placed my luggage curb side as I filled out the statement, or so I thought! I handed him the copy and exited the cab to collect my things, that's when I noticed that my duty free bag was not sitting with my luggage. I turned back to the cab just in time to watch it speed off...I was robbed! I have contacted Yellow Cab twice, both times being transferred to the "Lost & Found" voicemail box. I filed an official lost and found request via their website, and even filled out a "Service Issue form" as from their website. It has been 5 hours since is was dropped off and nobody has returned any of my correspondence. I am starting to get that sinking feeling that Yellow Cab customer service is a black hole for which complaints or duty free bags never return! I have a new slogan suggestion: "Yellow Cab, yep we're still dirtbags"