Indian Oil Corporation [IOC] — LPG Delivery

I booked an LPG gas cylinder through Indane App and payment for the samewas made though app. At the time of booking i paid Rs 1079 for cylibder and got SMS of invoice genration of the same amount.
Next day i was called by the delivery agent regarding delviery which i couldn't able to recieve as i was outside the town for official work. i asked them to deliver me after 6 PM. although the agent refused to deliver.
Again next day i get the SMS regarding cancellation of my previous Invoice and Genration of New Invoice of amount Rs. 1129.
Why my invoice get cancelled even i booked and made payment before any price hike.