Taxify *******

So on 23/06/18 the a friend and myself took Taxify and she ordered the ride from her phone, at the end of the ride after we got out we realised her phone was still in the Taxify, we tried calling but no answer, we have sent emails one from her account and one from my account to inform them and gave her number with email address to track the last ride and give us the drivers details to arrange a pick up however no response, we have sent an email the Sunday 24/06/18 and I sent a follow up email the Monday 25/06/18 but still no acknowledgment of receipt the phone was on until late Monday afternoon and just died now it feels like its completely lost as we are not getting any joy from Taxify we tried calling it again and the phone is now just off which either means another passenger could have found it or it is still in the drivers car but all this could have been prevented if Taxify had just responded and assisted with this. I am disgusted at the way they treat their clients and even their drivers who work for them say they self had trouble with getting responses out of them its like they want us to use their services and not care about us after. Feel like Taxify should be responsible for the loss of that phone because as soon as we noticed it we have been trying to get a hold of them we have a receipt of the driver and all we need it the contact details to arrange pick up however possibility of that phone being found by someone else is very high at this moment as it has been four days since the ride.