@philip I'm not sure about that... While in my test I could get varied results
sometimes ping were good most times it spiked highly and had lot of uploading issues in speed test.
After reducing mtu value the issue was resolved.
Iam not well versed in this matter.
Contact the bsnl assistance. You could go contact the LCO - he would connect it to bsnl technical head (that's how they did it for me) they might connect through any desk, check for routing and other issues, that way you would know if something's messed up.
Guess that's the only the way. ☺
Hope everything gets solved quickly.