Airtel — Airtel worst service and ignoring disconnection

My airtel landline number is [protected]. For last 6 months i keep getting internet down problem. They cannot escape saying corona lock down. I am facing problem with them for long time. Every month i have to raise a complaint and some technician will come and resolve and it will work for 2 to 3 weeks and again same problem. Now internet is not working for more than 3 weeks and still it is not resolved and they simply closed my ticket as resolved without even addressing the issue. I have called the customer care and requested to cancel my connection but they are not at all doing that. They don’t have option from the app to submit discontinue request and nobody pick phone to talk.