Bharti Airtel (Broadband) — internet/ landline down since 21st april 2019

Address:

Electronic City phase 2, 560100

Internet/ landline is down since last sunday and technician named kaleeshwar (Mob [protected]) neither contacted me nor visited my house.
I am almost calling them daily to understand what's really wrong, but every time they will provide different eta and will assure me that they will rectify it next 5-6 working hours.
Today i called the technician but he just cut me off after listening to me.
Tired with the pathetic service of airtel i am going for disconnection. Please don't choose airtel.
Post my airtel broadband i will port my airtel number as well.
Sr[protected]