Not delivers the gas cylinder in home

My consumer No.607700 by name of beant singh we are having lots of problem in delivery of cylinder either they are not delivered, in home we have to go and collect the gas cylinder in urgency. Always phone busy & if we aks serial number immediately they are disconnecting the phone. I went to Gas Agency regarding this so many time I complaint. No responce or no action. Always saying there is no stock. It'll take another 5 to 10 days. Atleast they are taking more than 20 days.