Hindustan Petroleum - LPG — Delay in delivery

sir,
I had booked a cylinder on 20.11.09 for Refilling vide my Gas connection No.666989 in M/S Mohan gas Agency, Meerut. But till today (26.12.09) I have not received the clyinder.Every time they are dely in supply.Every time I have to fight them.After that they will supply.I complaint lot of times about the agency in Hindustan petrolium.But no reply.
The agency is selling the cylinder in black.
So please take neccessory action.

Thanking you

P.Soundarajan
meerut