Indian Oil Corporation [IOC] — fraud

Address:

Saharanpur, Uttar Pradesh, 247001

I am the customer of sun beam gas agency situated at saharanpur pin 247001.
Problem is that book refill through mobile and there is waiting of 20 days while bharat gas is providing same day.
How the employees being fraud :-

When we booked online they says that here is waiting for 20days, when u will go after 20 days, says that your booking cancelled between this they generate refill and sunsidy goes credit to our account and black that cylinder to another person approx amounting rs 700.

They take subsidy in cash to whom it blacked so that is why the delivery takes 20 days.

This is a purely fraud by this agency.

Please take necessery action regarding the same otherwise i have to go for top level.