Erroneous payment made to Capitec

My elderly mother of 84 years accidently deposited R 7000 into a wrong Capitec account nr: *** and it was an immediate payment. She did so using her ABSA app. We called the ABSA call centre number to try and get the payment recalled it kept taking us from pillar to post. When we did eventually manage to speak to a consultant she was useless and her service was terrible. She told us that there was nothing she could do because it was an immediate payment. She didn't try to assist in any way. We want to get this payment reversed back into her account but ABSA is not willing to assist. We also sent an email to *** but we haven't gotten any response (C-***3).