BSNL — very slow Internet speed

Address:

Pune, Maharashtra

Greetings there,

I am using my BSNL Agri sim since more than 2.5 years.
But currently I am facing drastic network issue where am working currently [i.e. Hinjawadi phase#2, Quadron (DLFA) area, Pune], people & my office colleagues are not able to call me. Moreover I am a software proficient & this is my professional office cell no.
And the other issue is am not at all getting the data/internet speed when am using it at my current residential address[i.e. Armament Colony, Ganeshkhind-Goalmarket, University road, Pune].
Network problem in office & internet problem in home screwing my life like anything.
Kindly help me ASAP on this please as I don't want to break this long time kin with BSNL.