TAXIFY South Africa

I Requested a BOLT TAXIFY ride today and my app displayed that I was going to pay R26.00 Rand from pick up point to my destination. However after I was picked up and travelled to my requested destination, the driver asked me to pay R42.00. If I knew as it was almost a walking distance where I was going I wouldn't have requested, But they gave me a different amount from the one I was chaged . The Drivers name is Siyabonga driving a VOLKSWAGEN POLO VIVO Registration number : FJ10LFGP