UBER frustrating

An Über cab pulled up *******ly at entrance to mall. No Stopping signs are everywhere. As my car passed the Uber (A large black BMW X) The passenger in back opened the BMW's door into my car. R 24 000.00 in damage. Driver and I exchanged numbers and driver and passenger apologised and he confirmed that I should claim from his insurer Mi-Way. Long story short - Mi Way refuse to honour claim as driver changed the story and said I drove into an open door even though its's clear from damage that it could not have happened as per their clients reviewed story. Case closed. No way of contacting UBER re these kind of issues. Mi Way says passengers must pay? What should UBER do?