Hindustan Petroleum Corporation [HPCL] — amount taken extra

Address:

413002

The hp petrol pump in solapur near chalta sari centre is taking round figure amount from customer and not filling petrol of same amount. I paided 50₹ amount for petrol and the petrol filled is 49.35. Isn't this cheating the customer. I told the attendant there then he is saying the system is locked. Then is the company doing such cheats.
Who is responsible for loss?
What kind of service is this?
Is the cheat policy national??
Is this the correct way to earn money? Profit
On what basis is the attendant selected?