Hello aspirant,

Though you did good in the written exam, but at a place like IIT-BBSR, a interview if you have had done well would have opened the gates to let you have your admission. Since your interview went totally wrong and was at a state of no-no balance, it will certainly lead you to get rejected. A bad interview will ultimately take you towards the rejection. Had you had prepared well, this day you would not have seen.  If the admission committee is wavering on an applicant, a bad interview will get you rejected. So getting into IIT-BBSR is an absolute No if your interview went wrong totally.

Hope, it helps you.