Unfairly charged by Uber

Good day Sir/Madam I would like to dispute a unauthorised transaction. I was unfairly treated and maliciously charged for a fee that I was not liable to pay. I was charged for a cleaning fee of R500 on a uber trip, which I was not told about, and I did not mess in the car. I exhausted all avenues. I’ve contacted uber regarding the Uber driver that adjust my fee 5 days later after I took an Uber. How is it possible for a uber driver to adjust my fee 5 days later and said it went straight into Victors account. I am a student and I am very unhappy. I have evidence of the original fee and the adjustment that was deducted.