Driver *****ing passengers phone

I took a Taxify yesterday sat in the front seat and I asked the driver to chargey phone and gave him my cable to use as he didn't have my charger when I dropped of I forgot to take my phone but saw immediately after he drove of and I called my number but he didn't answer I called whole night and in the morning the phone was switched off, I then sent a email to bolt they rep**** said that they called the driver and driver said he didn't see the phone I then asked for the driver's phone number they said they can't give me asked for the number plate and noone rep**** after that ,now I'm asking how could you charge my phone and it was next to his but tell me that he didn't see the phone and why are they refusing with the driver's details .