[Resolved]  HP Gas Cylinder — HP Gas Cylinder

Hi
I hold a gas connection from HP gas janakpuri distric center New Delhi, last some days ago i requested to refile my gas cylinder.due my absence or my family member absence gas agency peoples gave my cylinder to somebody else and take Bharat gas cylinder from them when i reached to my home Cylinder already used by someone and i got used cylinder, i ignore the thing the person who got cylider return my cylinder to me, ask me to exchange the cylinder it is agreement between gas deliver boy and concern person,

Last 07 Days i am calling to agency exchange the cylinder but they are not exchange the Gas Cylinder,
kindly advise i need to do got my cylinder back