Hey! 

If you are aiming for Consultancy or Finance, and you do mention it in your PI round after clearing chance. You have good chances of getting in. Whereas, companies prefer freshers in Sales and Marketing. Secondly, your past academic score does matter in getting admission in IIMABCLI. But, many new IIMs doesn't give that much importance to your past academic marks. So, you have a fair chance there. Secondly, you can apply for other top B-schools like IIFT, TISS-NET, who gives importance to work-experience and doesn't consider your past academic records. You just need to clear the exam with good score. So, prepare well and ace CAT. Best wishes!