Extra charges Nd **** driver

Last night I requested from Fourwaysmall to dobsonville bathi street, first thing I noticed about this **** of a driver was that he was not sure if he must take the trip or not, he then took us to bathi street and when we arrived at the destination the trip was charged R190, I then paid with three R50 and two R20, this **** from Uber took the cash said his good byes then that was it, to my surprise when I tried requesting this morning I came across a suprise of me Owing Uber and the driver R100, like the driver reported he said I paid him an amount that was full but it's funny we never even exchanged words nor disagreed with this individual and again if I gave him money that was not enough why he never told me or made me aware... I've been with Uber for long enough to try and take chances.... I'm an awesome customer and I'm very disappointed and disgusted by Uber and their **** driver.... People should be aware of such drivers from Uber... His reg HL82WMGP it's a white Kia Rio from uber