I'm sorry to hear that you didn't get the grant. Feel free to PM me if you need advice.
One thing to say, I applied for the scholarship together with my twin sister, and both of us got invited to the interview part together. In addition, our academic background, research experience and grades are similar. I think our performances on interview was the reason of why I got the scholarship, and my sister didn't. Hence, my advice is to keep improving interview skills.
Good luck in future