Refund on return part of ticket
We have return tickets ATH-JNB-ATH with EK. Their administration is useless, they do not answer e-mails.
We are currently down south and have decided not to return to Greece next year as we usually do for their summer due to building work next to our house there.
I appreciate that a ticket is only valid for one year so I can't change the return date by one year. Can we get a refund on the return part of the ticket? If so what percentage?