Bank Of India — Charging extra money for swiping the debit card at petrol pump

Address:

Mumbai City, Maharashtra, 400061

On 15th march 2017 i swiped my debit card at petrol pump for the payment of filling the petrol of rs 500. I was charged rs 14.04 extra for that by the bank.
The employees working there never answer properly. The employees of YARI ROAD branch (andheri W) Mumbai.
I don't know why i've been charged 14.04rs for. I want to claim the refund for it.
The petrol pump at which i swiped the card is at airport road. The agency name of that petrol pump is COCO-SAHAR (FORT MOTOR EQUIPMENT CO)
He invoice number is 016974.