No buddy your rank must be under 1k

Sorry but there's no of getting into Jadavpur university as it is among the best and top most college of wbjee hence it's cut offs are very high but you can can other admission into other  colleges of wbjee , you have yo wait for counseling process to start till then you can predict what colleges you might get with this rank with the help of wbjee college predictor and can also check previous years cutoffs of different colleges for different branches.
https://engineering.careers360.com/wbjee-college-predictor
Good luck