Yes, you will get the refund amount that you paid to block the seat, but you have to apply for the refund before the mentioned date. You have to go to the official website of IIM Trichy. During the admission process, they generate a link for a refund as well. You just have to fill in your bank account details and the reason for not joining the institute. They will refund your amount within 4-7 days. The same case happened to me. I paid 20,000 rupees to block my seat for IIM Trichy core but was not able to convert; after some time, when I became hopeless, I applied for a refund, and they returned it in a few days.