Ola Cabs / Ani Technologies — extra cash collected by the driver

I had taken an outstation trip from chandigarh airport ot nawanshahr, punjab. The payment mode was ola money, however the driver asked to pay part of the amount in cash as he had his emi deduction due. So i transferred 4000 to the drivers bank account. Later when the final billing was done, the final bill amount displayed was 7221. I had 4000 ola money in my walet, ola additionally deducted 1000 from ola postpaid. The total amount paid to the driver was[protected] through bank transfer, 5000 through ola money). Since the driver was not carrying any cash, he said he'll transfer the money to my paytm or bank account, and had taken the account details from me.
The total bill was 7221 (Displayed by ola), 185 toll and parking charges, the receipt for both were shared. He additionally cahrged 720 for interstate permit, the soft copy of which was to be whatsapped, but he hasn't shared it. So, the total fare accounted to 7406 (For which there are bills) and additional 720 (If bill is provided for the interstate permit). The total paid amount is 9000. For the interstate permit invoice and refund of balance amount from the partner, i had raised a request with the ola support team but they categoriaclly keep on responding that they have spoken with the driver and he has denied having collected additional cash. When asked to arrange a conference call with the driver, ola hasn't obliged. There should be some accountability from ola when they facilitate the car services. The said trip was undertaken on nov 27th, 2019, with crn [protected].
Attaching the screenshot of bank transfer to the driver's account. The ola money transactions you'll be aware of.