Raj one last thing you could try is when the tech comes to your place, ask him to just put a stand by modem and test the speeds, about 3 years ago I had major upload problems reliance tech did everything for about 40 days changed the line ports etc every possible thing I was just about to disconnect the connection coz of the slow upload speeds less than 40 kbps, when I suggested them to just try a spare modem and that fixed the issue.