Driver sound very suspicious that he knows the whereabouts of my phone

I lost forgot my phone on uber on the 27th of this month at 4:22am. I remember two minutes after the driver dropped us off that I left my phone and I dialed my number it rang but there was no answer. I dialed again it went on voice mail. I contacted the driver and he sounded very suspicious when I asked him about my phone. 1st he asked me what type of phone and the colour, I told him it's a Samsung galaxy note 3 white in colour he then said problem is that he took the car to the car and he asked hobo to wash it... my question is why would you take your car to the car wash and then asked hobo to wash the car?? I phoned him so many times on Sunday and he rejected my calls, everyday I try to call him but he is not answering my calls..His name was Njabulo driving a Toyota Etios. We requested him at 4:22 with my friends number ********** 292. All I want is my phone back, there's work emails on that phone.