RTI holds only for informations of public interest. specifically, the following is exempt from disclosure :
"Information which relates to personal information the disclosure of which has no relationship to any public activity or interest, or which would cause unwarranted invasion of the privacy of the individual "
So, if you can establish such public interest RTI provisions can be used.
OTOH, if you need these informations for your personal interest- cases pending in court for example where such information could be relevant - you can move an application in the Court accordingly. if court requires then public authorities will have to provide such informations to further the cause of justice.