Indian Oil Corporation [IOC] — Fuel filling quantity fraud

Address:

Apurv Petrol Sales patna

I have refilled today my mahindra kuv100 on an indian oil pump namely apurv petrol sales, kumhrar, patna.
They filled the 35 ltr capacity tank with 39.13 ltrs.
Then i raised the doubt to the pump manager, he then nervously told to vacate the tank and measure the fuel vacated.
I did this to find the truth whereas my tank was filled with minimum 5 ltrs of diesel already.
When the tank was vacated only 39.75 ltrs of diesel was recoverd.
I asked the manager then about the theft done by them.
He then started arguing that you had no fuel in the tank before.
I just want the indian oil company to enquire about this case, and take hard measures about that fraud.