Frustrating Service/Incompetence processing refund

When making the final settlement payment for my car I inadvertently paid the settlement amount into my wife's Wesbank account which had been settled but wasnt yet closed. I picked this up a couple of days later when I received notification that my Natis document couldn't be released as payment hadnt been received. Payment was made on 12 June and I contacted Wesbank on 19 June to try and resolve it. As the funds had been paid into my wifes accountt Wesbank would only deal with her regarding the refund. She has sent proof of payment and all the necessary documentation and has spoken to Wesbank consultants on the customer care number at least once a week since 19 June. Each time she is tokd that they have all the required documents and that the refund will take 5-7 days. As of 16 August no refund has been made despite numerous assurances that it would be prcessed. The latest was a committment that it would be paid by close of business on 10 August. We have requested for it to be escalated and asked to speak to someone senior thst can give it the required urgency without any success. A very frustrating exercise to date.