Bharat Sanchar Nigam [BSNL] — landline/broadband out of service from more than 20 days

Address:

J block, Purva Panorama, Kalena Agrahar, Bannerghatta Road, Bangalore, Bangalore, Karnataka, 560076

I am staying in purva panorama, kalena agrahara, bannerghatta road, bangalore and have a bsnl landline and broadband connection at this address from 2 years. The connection frequently drops and broadband is down most of the days. Even the bsnl gsm phone service does not work in the region and we are facing major connectivity crisis since we depended solely on bsnl. We lodged a complaint for landline but it got closed without rectifying the issue. We lodged another complaint with docket number[protected].
I got a sms that the complaint has been assigned to bsnl staff mr sundar: [protected], when i called up sundar he said that he has taken retirement from the department and is no longer working in the department.
When calling customer care about the discrepancy about mr sundar they said it is a server error that complaint got assigned to mr sundar and a new technician will be assigned to resolve the complaint. It is 3 days but the new technician is not assigned.
My bsnl gsm number, my wife's bsnl gsm number and my secondary bsnl number also fails in purva panorama j block.
Please help resolve the matter and we should get at par service from bsnl.