Uber the worst Service ever

On the 11 april 2018, my friend requested an Uber. The driver came to Gateway to fetch us. Once the driver dropped us off (Jabulani Avanza Number Plate ND789...) I then realized that i dropped my phone in the Uber. We then requested Uber to call us and they stated that they will call back in 10 minutes as everything is done on the app.Till now i am unable to find a contact number for Uber. Up until now which is more than 48 hours Uber has not returned our call. Had the consultants called back the driver would have been able to find my phone on his back seat but due to this pathetic service any one of his other passengers or even the driver himself could have taken my phone. This is extremely pathetic service from Uber and it makes me wonder how safe passengers really are. Its also scary to know that Uber does not care about their passengers well being as if they did they would have responded to my request and my phone would have been found. This is a very big inconvenience as i have all my personal information on my phone that is fairly new. I am now left with the cost to purchase a new phone and this has become a security issue to my personal information.