Uber India — had to pay cash for a non cash trip

I took an Uber ride on 24th Oct 17. I was asked a cash payment by the driver as he said he hasn't received any online pay knowing that I have less paytm balance I believed him and paid cash of 300rs. Immediately on my next top up of paytm Uber deducted money for the trip 303.96rs. Upon asking for a refund what I get is just a copy paste reply that it's not Uber transaction so can't refund my money.
How can it not be a UBER transaction when I had to pay it to Uber driver for an Uber ride.
Have been telling them to investigate with the driver if they want I am okay. But nope all I get is a big noooo