Unpaid trip - R188

I requested a ride from my house - Soweto to work which is at Bryanston. Driver picked me up at 6:20 on a Monday. And was dropped off at 7:20 at work. My trip was said to be R188. I gave the driver - Sylvester Xolani R200 who was driving a white Hyundai Grand i10. I didn't ask for change. I assumed all was good until I wanted to request another ride today & I see an unpaid trip of R188. Please have this sorted ASAP