Airtel — Internet & landline not working

Address:	Airtel Center, Plot No. 16, Udyog Vihar, Phase-IV, Gurugram – 122015, India
Website:	www.airtel.in

It is since 3 days from when i have raised a complaint but there's no progress in the service, the technical team from airtel are not responding to calls.
Airtel has not upgraded my connection from copper technology to fiber technology for years together and because of it, im getting only 16 mbps speed but as per my basic plan, im supposed to get 40 mbps speed.
Im totally disappointed with airtel's approach, they neither upgrade the technology of my service nor resolve the connection issues promptly nor atleast cancel / disconnect my service and they expect me to pay the bill on time fully for a fiber technology plan.