Seriously bad service from Standard Bank

In December last year I had to transfer funds to Drs Du Buisson. By mistake I entered a wrong account number for them, and inadvertently paid the wrong customer. When I had realized my mistake, I went to my bank who told me that I had to contact Standard Bank in order to have this money refunded to me. This is where the nightmare began. I has been 9 months of visits and endless phone calls, and only to be told that the bank is investigating the issue. Apparently their client is aware of the faulty deposit, but all I am getting lately is long stories about this and that and the next thing. What is taking so long to sort this out? I'm getting the distinct impression that no body cares and that that its not their problem. I'm not going to leave this here. I want this matter sorted out.