Ola Cabs / Ani Technologies — extra cash accepted by driver on outstation ride and not returned the remaining balance

I took outstation ride with ola cabs from delhi to chandigarh on 22 mar 19 at 2345hrs
The details of ride are as mentioned below:
Customer ride number : crn[protected]
Cab driver : gurtej singh
Ola mini ertiga
Pb01b5431
Operator state/ut : chandigarh

Driver took rs 500 initially for cng refilling and didnt deduct this amount from the total billed amount of rs 2899..

I paid him rs 3000 + 500 (Cng) and he didnt returned the balance amount..

So, the remaining balance of rs 601 needs to be refunded to me on priority..
I paid all the tolls and taxes enroute delhi to chandigarh..

It was really unsafe to travel with him due to his rash driving.. Also, his rude behaviour and incorrect pricing has resulted in no value for money..

I would request if possible the driver should be penalised over and above the extra amount which he took..

I want the issue to be resolved as soon as possible otherwise as a defence personnel i will be forced to file a case against ola cabs regarding inconvenience caused to customers..

Expecting an immediate response..