Indian Oil Corporation [IOC] — two invoices for one cylinder on different dates

Address:

3G,Block 15,Jains Sunderbans,Gurusamy Road,Nolambur,Chennai, Chennai, Tamil Nadu, 600095

I booked a refill on 5th feb and i received sms that an invoice[protected] dated 10th feb for rs.734/- has been prepared and the cylinder is on the way for delivery. To my surprise today 12th feb the delivery boy came with the cylinder and gave me
An invoice no.[protected] dated 12 th feb for rs.881/- and said the price has been revised today. When contacted the distributor, they said that the invoices have been prepared by the ioc and not by them and i have to pay the revised amt. Though i paid the revised amount, i feel that it was not fair to pay an excess of rs.147/-for no fault of mine for revising the invoice and hence i request you to look into the fairness of this and arrange to return the excess amount. Though the money is not important here but the fairness. Will they do the same if the price is reduced after invoicing the same.in this connection i wrote a letter to ioc on 12 th itself and they said necessary action will be taken. Their reference number is[protected] dated 13th feb. As i did not get any action result i am writing this letter.