Unhappy client

I accidentally sent 700 to the wrong person because I pressed one wrong number, I called the person and she said she us not using Capitec bank, meaning that a person who uses capitec is no longer using that number. I called Capitec several times asking for help, I was told to go open a case or go to small court but if that person already withdrew the money there is nothing they can do. Mind you it does reflect on thier side that the money is mine and the person I accidentally sent it to does not use Capitec. I just needed them to reverse the money because it's rightfully mine but I could nit be helped, even after calling and visiting thier branches nd going to court. Dissatisfied client.