Finished it. I called customer care, the aunty wrote a complaint and said tomorrow I'll get a call, on how to resolve the issue. I asked her if I could get more data as they promised unlimited internet, she said I don't have the authority, you'll know it tomorrow.
Edit- One lesson, never finish your data limit (fup) on Sunday. The MTNL guys would not resolve your issues on Sunday. I'll update tomorrow if I get additional data or not.