Will KIIT refund my 65K (after counselling and taking a seat) If I don't wanna take admission?

Yes, you are supposed to obtain a refund in case you refrain from taking admission following the counseling. 

Be that as it may, you possibly would not get the whole amount back. They will deduct the counseling fees. Which is around 6000. And you will get a reimbursement for the rest. 

If you have decided you are not joining the institute, start the refund process as soon as possible. As you won’t get back your money after the reporting day. You can visit the campus to know more about the refund details.