No, there is not. I don’t want to sound too harsh on Epic (luv ya guyz), but if Epic can’t even manage to let us view sales stats in real-time, or individual sale details at all, or allowing us to give out free access to our items, they definitely aren’t going to be able to help us when we think we’ve caught someone pirating our work (although to be fair there’s not much to be done anyway).
Epic, basically, shouldn’t be issuing refunds on behalf of sellers if they’re not prepared to invest serious time and effort in finding out if the reasons are legitimate. I know that’s a non-trivial task, but you know… hire people.