Uber — Outstanding amount that was PAID IN CASH

I took an UberGo trip from B.Baruah Road, Ulubari, Guwahati - 781007 to Silpukhuri Bus Stop, Guwahati-781008. The driver was paid the expected amount for the trip in cash but I forgot to switch my payment model while riding the trip. The driver's name is BABU. I ended up paying him 13-14/- more than the actual amount for the trip. Even when the trip ended, he didn't update me about the extra cash payment because after getting down from the cab I stopped the cab again as I forgot to carry my sanitizer.