Hp Gas — delay in supply and rash/arrogant behaviour of hp gas office

My HP gas consumer no. is 620778 with M/s. Gopal rao enterprises, santoshnagar, hyderabad-59. I am regularly being harassed and put to incovenience by the representatives who attend the calls of the above agency. There is delay everytime. For ex. I booked for a cylinder on 13-06-08 vide booking no. 7028 and on that i was promised that it will be delivered within 5 days. When i contacted on 6th day, i was told that u have to wait for 1 day and again on 20 JUne, 08(7th day) when I contacted on 24330210 i was informed that it will be supplied by the next day[protected] but the supply was not done. When i rang up on 23-06-08, i was told that it will be sent the same day and the guy who answered was very intimidating, rough and arrogant as if i was begging or taking a free cylinder. He remarked that "be patient u r having food because we are supplying cylinder to u". I got very angry and felt insulted by such comments of the useless fellows answering the phone calls on behalf of M/s. Gopal rao enterprises. These rogue agencies are black marketing the cylinders and putting into untold trouble the innocent and genuine customers. It is high time that strict action must be taken against such agencies and black list and cancel their agency licences.
I hope a quick and favourable action will be taken against the above agency and intimate me at the earliest