Ola Cabs / Ani Technologies — fake taxation

Address:

Flat No. 3, 354 SRK Apartments, Sultanpur, New Delhi, Delhi, 110030

The estimated fare before the ride was Rs. 1100, When I reached the destination the bill was Rs. 1294,
and on top of that, The driver took Rs. 150 extra(not included in the bill) calling it state tax.
I even called the Customer Care and they said a Supervisor will call me at 02:00 PM today but as expected they did nothing.
The driver said he pays State tax per month. But if he pays it per month, how do u guys decide how much take from each customer.
He did not pay any tolls during the journey.
How are They(Ola) depositing this tax to the government.
Why am I not getting any RECEIPT for the tax I paid.
How do u calculate this tax.
Who gives the drivers the authority to have their own taxation system.