Indian Oil Corporation [IOC] — petrol station cheating

Address:

Chittoor, Andhra Pradesh, 517501

The petrol bunk at kt road, tirupati is cheating customers by not filling the petrol for amount charged. We noticed 4 times so far. Latest being today. We asked them to fill for 1100 they set it for 1100 then stopped the gun at 200. We did not any movement in fuel indicator for that. When asked they said gun stopped on its own
Which i think is not true. Then we asked to stop it and put only 300. We saw movement in fuel indicator. So effectively only for 300 instead 500 they charged. They stole 200
Please take action against the bunk.
Thanks
Bharath