Refund

My Mum mistakenly transferred R 3000.00 to a wrong number via Capitec cellphone banking, 8 months ago, we immediately went to Capitec bank in Evaton Mall in the vaal to reverse the money, proof of payment was there Capitec also saw on their systems that the money came directly from my mum's account to the persons account, we were told we need to call the person first and he must confirm that we mistakenly sent him money but the number was off Fortunately for us the money was not withdrawn yet, so Capitec Froze the money, The issue is the number has been off since That time till now which is 8 months later, so what Capitec is saying is that they can not reverse my mum's money even though there is proof that she sent it??? Chances are the number does not work anymore and that particular person is not even aware he has money that is frozen on his account.