Uber App Driver Cancelling Trip and Charging cancellation fee higher than the trip

I am very disappointed that after over 5 years using the the Uber app. I could be so inconvenienced and disregarded.

I made a trip booking in advance on the app, I made my booking around 8h16 on the 22nd of February, for my trip to be between 8h40 and 8h50. My trip was estimated between R30 and R38. The driver texted me at 8h39 that they had arrived, I rep**** I'll be with them shortly. A couple of minutes later I stepped outside there was no car.

The app had a message saying "Nkosinathi had to cancel, we'll find you another driver" at 8h49, I tried to cancel but the app wouldn't let me. So I ended up walking to work. I have been querying that even if I was charged, how come is my cancelation fee R55 when my trip was less than R40?

If I'm charged a higher fee for the driver cancelling, why not phone me or wait and charge a waiting fee?