UBER OVERCHARGE FOR A STOP THAT WAS NEVER PART OF MY ORIGINAL TRIP REQUEST

I was overbilled by R 643 for a stop that was added to my trip without my knowledge after the driver went on a wrong route I requested a trip from Lanseria airport to my house in Ruimsig , UBER gave me a quote of R 190.00 which I accepted,the R 190 was the reserved on my bank account, the driver arrive BUT on route home , took a turn onto the Highway heading towards Pretoria.

I then IMMIDIATLEY corrected him and he the cancelled that trip(WHICH I NEVER ASKED FOR) and we proceeded to my house in Ruimsig. As he dropped me of , UBER then billed me R 833.00 instead of the R 190.00 EVEN THE DRIVER AGREED THAT HE WAS WRONG , I have asked UBER to confirm with the driver but up to now , NO RESPONSE OR REFUND FROM UBER. Literally daily light robbing !!!