Hii Nik..

You have performed quite well in Wbjee exams and I will say that there is high chances of getting CSE at Heritage Institute with this rank.

You can also try for IEM , Kolkata CSE or IT Dept  as it is also a very reputed college with having quite good placements.

Other than this if you are having home state quota West Bengal then you can also try for government colleges like Institute of leather Technology or  Institute of ceramic Technology or KGEC (Kalyani Government Engineering College).

Hope this helps. 

Best of luck for your future.