Items driver drove off with and uber cant give me clear feedback and finding the driver on they pay roll.

I took an Uber X ride Saturday from uber Driver name DELROY NDABEZINHLE registration KM01YV GP The account he gets paid or Shows on the invoice is Musawenkosi Shaun Dube left my phone in his car when I tried stopping him he drove off I assumed he could see me in the mirrors but called him through the app 5 mins after from a friends phone he didn't pick up I called my phone he didn't answer i sooner realized my banking apps got block and I been asking uber to connect me with him and return my phone ITS an iPhone and they cant reach him why is it we report missing items from one driver and he not blocked and held responsible I want a way forward from UBER on getting my phone or how they planning to make up for such disloyal drivers they are giving us cause we use uber to be safe not to be easy targets and this app or online support uber has made is useless.