I want to complain about the SURVEY PARK GAS SERVICE , C/215 , SUTVEY PARK , KOLKATA 700075 that ,everytime we book a gas , the agency is not providing the gas even after 15 days of booking . This is happening repeatedly from last 6 months. whenever we try to call no one answers the phone even if they pick the phone after trying for two three days there is no satisfactory response. When the person comes to deliver the gas cylinder , either he brings a duplicate bill or don't bring the bill and says that he has lost it , we doubt that they sell the cylinders in black .