Indian Oil Corporation [IOC] — rude and greedy behavior by delivery person.

Address:

Bangalore, Karnataka, 560037

This is to report rude and greedy behavior by the delivery person.
My consumer no is cx63651.
Every time the delivery person comes to deliver a refill cylinder, he demonstrates a very rude and greedy behavior.
He rudely demands 40 50 rupees for delivery charge on top of the bill amount.
If you question, he miss behaves and leaves the cylinder outside the door.
My house is at ground floor with my door 5 meters from road.
My mother is a senior citizen, but he starts misbehaving and shouting at her, and refuse to give the remaining balance.
As if he is so much addicted to free money that he can't survive without it and he will go to any heights to get free money.
Today is once such bad day.

I've been warning the person for past many months, but seems he is least bothered about complaints and is not going to behave properly.
This is heights o[censored]nprofessional-ism. He never offers any digital payment options never shows the cylinder details like proper weight etc.
I request you to please take action on this so that we should not be getting such behavior again.

Thanks.