KIIT doesn’t cancel anyone’s candidature, as per my experience. It is a hard fact that no engineering college (except for tier 1 colleges) rejects the candidature of students based on their past academic performance. The practice of donation is followed in many government engineering colleges too.
KIIT University won’t reject your candidature. But you might not get the branch you are hoping for.
According to the conversations I had with my friends from KIIT, the institute is not known for canceling anyone’s candidacy. Very few engineering institutes in the country reject candidates. It has been seen in some government colleges that a lot of students enter through the donation system.
Since you have already received the letter of admission, you can be assured that your admission has been all but confirmed. KIIT only looks for the total percentage, not the percentage in PCM. If your aggregate percentage is higher than 60% then your candidacy will not be canceled.