Unhappy with Uber

I have an issue with Uber. Stopped using them some years back when I got charged for meals I did not order. However, I started using them again lately for rides. At first I encountered adjusted fairs on 2 occasions which they rectified. A third and fourth instance they refused. Yesterday the same thing happened where the fair I saw when requesting a ride was adjusted to a higher amount in the end. This is unacceptable and I had enough. Upon querying this I was told the price is correct and cannot be amended. I find all of this to be ********* business practice. I choose a ride based on the price shown on the App only to notice afterwards its been adjusted to a higher amount. Furthermore, what I also find strange is that it seems drivers have the authority to change and adjust prices as they see fit. I paid R89 for a ride of 16.9km a few weeks back and yesterday I paid R99 for a 6km ride. This does not make any sense and seems like a *******. Uber is supposed to be REPUTABLE company but you cannot get hold of support other then email and message. In cases like this a consumer should be able to speak to someone in person. Not very impressed with Uber. They are supposedly the only safe travel option in my country but that doesn't mean they have the right to do this to people. The responses from them is unacceptable by simply stating that the price is correct . The price you see is the price you must pay. I have used the cheaper options before and they do not have any of these issues