Steps that were taken by Jio for each service request to resolve the issue are:-
1. Pulled a fiber line from a different splitter box outside the home - the claim was I would not be sharing fiber with others.
2. Replaced the modem / router with a brand new one - claiming it was the newer version with hw bugs fixed.
3. Removed the splitter (white box) and orange fiber and directly connected the black outdoor fiber to the modem directly.
Service personnel would check for power during every visit and ensures that it is within the recommended range.
So far nothing has fixed the problem.
This time the customer service person triggered an escalation and arranged for a house visit. Let's see.