LPG cylinders in black market

Dear Editor,
It is to bring into the notice of the concern authority regarding the misery of common people in acquiring LPG cylinders.
I am a LPG consumer cardholder of Arun Subansiri, Naharlagun. Lately it has been noticed that it usually takes almost 3 months between the issuance of two cylinders. Generally in Itanagar the time is one week or 15 days.
But to my shock, cylinders are available in black market, which is charged ?1500 per cylinder.
I fail to understand when the genuine LPG cardholders are taking so long, how come these black marketers are managing.
This is clearly exploitation of common people and it is not possible without the involvement of Gas Agency.
Therefore, it is my request to the concern authority to look into the matter.
A aggrieved citizen