Because Ticketleap is the ticketing system, not the event organizer, Ticketleap cannot make the decision to refund or exchange tickets on behalf of the event organizer. You will need to contact the event organizer directly if you are looking to refund or exchange your ticket. No refunds are allowed unless the event organizer decides to refund your transaction.
You can contact the event organizer through their Ticketleap event page. If you've already purchased your ticket, please be sure to include your order confirmation number. It'll make the transaction easier for everybody.
This is an example of the contact box from the event organizer's page.