We caused a mess ?? R500 charged

I am sorry I will never be using Uber again as I was charged R500 FOR APPARENTLY leaving a mess . I would love to know what this was as there is no proof what so ever . My friend and I were asleep most of the trip as it was early hours of the morning. I am outraged and confused at this claim. <br> I advice people to be aware and prehaps take before and after pics. <br> <br>