One thing that’s not clear. The tweet you show claims you are “appointed” to a position by a human rights org in India. But your denials all say you aren’t “working” for India, and you claim here for “intel agencies”.
It would be good to be more clear on both sides. Did they appoint you or did you associate in any form? Are they an independent org or a government agency? Maybe there were multiple accusations you are rolling into one?
The International Human Rights Foundation (IHRF) seems to be an NGO based in New York, perhaps with offices in India as well, but they don't seem to be an organ of the Indian government. The author of this article quotes a tweet trying discredit the IHRF by claiming they are "registered in India" (might be true, but so what?)
