Hello Akash,

Here are some of the top statistics colleges other than ISI  -

•  ST. STEPHEN'S COLLEGE ( New Delhi, Delhi, India )
•  ST. XAVIER'S COLLEGE, MUMBAI ( Mumbai, Maharashtra, India )
•  ST. XAVIER'S COLLEGE, KOLKATA ( Kolkata, West Bengal, India )
•  HANSRAJ COLLEGE ( New Delhi, Delhi, India )
•  HINDU COLLEGE, NEW DELHI ( New Delhi, Delhi, India )
•  RAMJAS COLLEGE ( New Delhi, Delhi, India )

Hope this helps.

Good luck!