Airtel — Network issue from last 6 months

Hi
From last 6 months continuously I am getting problem regarding internet and network problem at my location and from last six months, regularly I am lodging complaints to the customer care and through Airtel thanks app., but every time the complaint get automatically close and no actions are taken till date. I have connected to the Airtel from last 8 years. I am a post paid customer and my average monthly bill is 850. And against that Airtel is giving the poorest service. Requesting to kindly do the needful ASAP.