Unable to refund money deposited by mistake

On the 5th April 2021 I wrote to old mutual group schemes about the mistake that I have done on my side, I had wanted to transfer the money in my capitec account to my old mutual money account, unfortunately the money went to the old mutual group schemes account, however the money was not policy related it was just a mistake. I have been requesting old mutual group schemes to refund me the money as it is not policy related and it was just a mistake, the mistake happened on the 31st March 2021 and to date I have not recieved a positive response. I have been sending emails, I've been to their branches but to no luck, it's over 2 months and I stall haven't recieved my money. Old mutual is a ****, how can you not find money that you cannot allocate as it doesn't have a reference on it. It has my name on it and not any policy numbers am **** **** **** ****. I have been promised that I will get them money within 3-4working days but none to date