Yesterday, I sent an email to 121 along with appellate.southabts, gopal.vittal and net at in.airtel.com with a link to this thread. Today morning I spoke to Nodal officer (Rakesh). He told me that he understood my problem and it would take maximum 3 days to fix it. I also requested a callback from backend engineer to which he replied that he'll do it within 24 hours. Waiting for a call from backend engineer tomorrow morning.
Any suggestion what I can tell him so that he understands my issue in one go.
"Farther the server, slower the speed".
"Problem with national and international routing".
or maybe something better.