Shell India — i asked to fill petrol worth rs.200 in my bike but instead only rs.100 petrol was filled

Address:

Pune, Maharashtra

I visited shell petrol pump located on mumbai banglore highway in warje, pune.
I asked to fill rs, 200 petrol in my bike, the person filling asked me to get down from bike fr security reasons and already the meter showed rs.100 of before customer and he filled more rs 100 petrol over it and told me rs.200 petrol is filled.
I have been cheated.
I need a refund.