A government organization is not releasing the research funds and salary since 2 years

Dear all, I am a research student, I was working for a research project at National AIDS Research Institute (NARI), Pune, and the project was funded by Indian Council of Medical Research (ICMR). However, for the last year of my project, ICMR is holding back the funds for the salary and research cost. I have not received my salary since last one and a half year, Whenever, I try to contact them regarding my pending grant, they simply say there has been an issue with the documentation and refuse to answer properly, this is the case since more than a year. My total pending salary is round about 4 lakh. Finally, I have decided to file an RTI regarding this issue, but I am a little bit confused should I file an RTI against the NARI (Hired by this institute), or ICMR (Funding agency). Please enlighten me on the basis of the legal point of view, and I do have all communication regarding this issue, so, is it suitable to take any legal steps against ICMR because of withholding my funds?