Indian Oil Corporation [IOC] — Gas supply - paid om line and also in cash on 16/5/20

Address:

Block 3, First Floor, Cerunti aparments, Soundarya Garens, I Avenue, Vettuvankeni, Chennai-600115

I made on line payment of Rs. 569.50 on line for the gas cylinder to be supplied but before it reached the company, hey supplied gas on 16-5-20 itself and demanded cash payment since they have not received the payment from the IOC. So I had to pay in cash Rs 569.50, On 16-8-80, I made a complaint to the IOC for refund of the amount. But so far no reply or no refund.