yep.. these guys need
BIG BOOST 
to get moving.. same thing was done to me here and i followed the same route to get the problem resolved. In process, i get prompt updates and proper technical explanations for all the work done etc.
btw, i got my ecu updated to latest coming out of factory by delphi, courtsey tata motors.(as told to me) I need check that nevertheless in upcoming 10k service.
Am sure a few more Boosts will make tata understand that dealers are taking customers for ride