Where's the simplicity now??

Good day. I am Carmen Wilson and on Friday 17 th September I paid 3000 my sisters account. Only for her to tell me that she hasn't recieved any money. I paid it via the capitec link to her cell no. When I checked on my phone I accidentally added one digit incorrectly. My sisters cell no is ***. The number I paid the money into was ***... Me and her immediately went to the bank,Walmer Park branch which is 5min away. On arrival the bank was empty and I was assisted. I got told that I can't recover my money at all..which they (Capitec) can see om the system that I did pay to this account because the person I paid the money to must give their consent. I felt sick to my stomach...where is my rights? I just did the transaction 15min ago maybe and now I get told this? The bank called the lady who received my money and she made up a story...the bank charged me 7 rand..I called from my cell no and she told me they can call her again...her phone went to voicemail...long story short..I didn't get my money..I got told to go and make a case..Interestingly enough I asked if she said yes to the consent would they be able to reverse it? Answer was immediately...I need my money and something must be done here pls. It's covid and no one has got money lying around. The womens account no is ***. Her details is ME MOKONE. CELL NO . ***. This is ridiculous it's not like I have received money paid in wrong and that the bank can see I did the payment and still can't assist me? Capitec always has adds on TV how how u can simply banking with them...HAVE THEY NOT TAKEN THE TIME TO LOOK AT THEIR POLICIES FOR A SIMPLE MISTAKE LIKE THIS???? AND I AM SURE I AM NOT THE ONLY ONE....I ALSO CALLED THEIR CALL CENTRE WHICH TOLD ME THAT I FAILED SECURITY QUESTIONS...LORD HAVE MERCY...HOW CAN I ANSWER INCORRECTLY TO ACCOUNTS I HAVE...