Indian Oil Corporation — Cylinder black marketing

Website:

D 2 , upper ground floor, hakikat rai road adarsh Nagar Delhi 110033

I got a message of cylinder booking without booking. What the ### is this if I'm not booking then why message is coming and it says " invoice has been generated for Rs949.5 ..." . I think Angad enterprises is selling cylinder of some consumers in black Market at a higher price. I hardly book 8 cylinders in a year. I don't know what is yearly quota. But surely they are black marketing.