Hello

sorry , you won’t get IIST . 

you may look for other private colleges. offering aerospace engineering or you may give another try .

all the best 

hello dhwaj guptha,

THE IIST-INDIAN INSTITUTE OF SPACE AND TECHNOLOGY

giving the UG-courses admission only through the merit list of the JEE-MAIN rank holders

you can register for the admission in the IIST official website after then you have to submit the JEE-MAIN details

so after some days they will give admission according to the merit list in the JEE-MAIN  examination

they are not giving admssion through the JEE-ADVANCE

all the best