Indian Oil Corporation [IOC] — underweight gas cylinder

Address:

Vadodara, Gujarat

My indane refill cylinder was delivered with cash memo no.[protected] by indane gas distributor, anuj gas agency, nizampura, vadodara.
On checking the refill weight, surprisingly i found it weighing only 26 kgs instead of 30 kg.
Everytime it's not possible to weigh the refills supplied,
It must have been a regular practice of supplying under weight cylinders from indane gas.
I request immediate response in above issue.