Indian Oil Corporation [IOC] — booking cancelled but money not refunded

Address:

Bangalore, Karnataka, 560068

I had booked an lpg on 29th oct 2019 with online payment of rs 603.5 (Transaction id[protected], order number[protected]. Invoice got generated with invoice no.[protected]. Later the booking got cancelled mentioning that the price got changed. But till date neither the lpg got delivered nor the money is refunded back. I logged a complain (Case num: 1-[protected]) earlier mentioning the same issue but the complain got closed without any action by iocl. I want to get the money refunded as soon as possible. Kindly help.
Tiwary g, consumer number [protected]