hi,

It really depressing knowing your condition, to get admission in iits is not easy, but due to financial issue you can not fulfill them, but again it is not very late , in India and abroad there is no age limit for most of the post graduate courses. so if you have the courage and jest for learning you can definitely apply for master degree courses. however you did not mention what are you currently doing now. if you are doing job you can do masters courses on distance mode. since you are from mathematics background you may go for data science and data analytics oriented course which can be studied via online mode. also there is decent career growth in data science related field.

you may join upgrade data science masters program which is of 18 month duration, the course is collaborated with iiit bombay and  Liverpool John Moores University.

another course is available from simplilearn with collaboration of IBM is  master program on data science.

hope it would help.