Radhakrishna Indane Gas Agency — New connection complaint

I've booked new connection on 28/5/21 at Radhakrishna gas agency, Avadi and paid deposit and other charges.
Till now 9/6/21 I didn't get the connection, they even not yet registered.
Am following them past one week When am calling to gas agency and Someone picking the call and her name is Banu.. whenever I call she keep telling I'll inform to sir. I asked her to give that sir number to talk and she replies that his number is switched off and he not yet come.
I don't know who's that sir and when he'll work!
Irresponsible behavior, very worst service.
Pls take necessary action to get a new connection.