Incorrectly booked two tickets!!!

I've incorrectly booked a ticket for my wife to fly CPT to Lanseria for this Saturday, reference IFWWOV. <br> She booked her own ticket for Thursday without us realising, reference VLRITZ of which I was unaware. SO there are 2 tickets flying her to the same place!<br> <br> We both fly back on the same flight from Lanseria to CPT on Sunday, reference FAZYLM.<br> <br> The flight for her on the Saturday was an honest mistake is there any way to get credit for that or for another flight, if possible at all? You'd go a long way to keeping a loyal customer!<br> <br> Thanks in advance,<br> Jared