This happened to me, when I had to go airport early morning so I booked the cab in the night itself.
Cab was on time in the morning and we were on the way to airport but in between driver's mobile got discharge and got switched off then he started argue for extra money by telling he won't get the money for complete trip from ola.
He argued so long I was getting late so I had to give him 300 ruppes extra. Ola does not provide complete and quality setup to their cabs. It was my worse experience ever in a cab.