You are having postpaid Fiber connection? For me Airtel technicians have visited multiple times and called me near the junction box and shown me the low power in junction box but they tell me that they don't have the authority to fix the fiber issue due to vendor contact, so even after detecting the issue they can't fix it and vendor simply denies fixing this stating that it is not a major issue and yesterday when I called Airtel customer care these noobs told me that LCO has asked me to buy a new fiber from market and then they can fix the issue else not possible, I tried explaining them that issue is not in my fiber but the issue is in the fiber coming from your main junction box to my nearest junction box but simply they kept denying.
Even on Airtel Thanks App and XStream Fiber app I get the issue as 'Technical Issue Found' and 'Issue in fiber line' respectively under Diagnostics, but not even able to raise a service request as previous one is still pending from 49 days(raised on 5th March, 2022)