Gang of scammer in the name of IOAGPL

I received a call from [PHONE] who told me that my IOAGPL Gas connection will be disconnected so I should install an app which he sent to me. I tried to install that App but failed. His name appeared on my WhatsApp was RAVINDRA SAV MGL ADANI GAS. I approached the IOAPL customer care , they told me that he is a scammer. There after he changed his number [PHONE]. I made a call at 1930 but nothing was done. No body is taking any action against this Gang. I heard 2/3 voices on the background of my WhatsApp. The system has been collesped. What to do. Consumers are helpless.