So... this chilli plant got some illness or something and almost died on me. I cut down everything except one branch and left it. It's been getting water and nutrition and after just a week I saw small green leaves growing here and there. So I left it, instead of throwing it away. And, look at it now! It's a big change! I'm happy I listened to my 'don't throw it away just yet' and gave it a chance. :)