Funds credited to a wrong account due to universal branch code -Request Reference number is ***

Request Reference number is 1- ********** 234

I completed an online payment to a Namibian account, when the recipient advised that they never got the money, I phoned them to trace the transaction for me, I was told the recipient is not telling me the truth cos they could see the funds have been paid. I even asked if the universal branch code could make a difference, but I was assured not

When I called again asking them to reverse the funds as the recipient had not received the funds, I was then asked to complete forms, which I did...but only to be told that they could not reverse the funds due to insufficient funds and was told to speak to the account holder.

I have been nagging these people to investigate the matter and every time they told me the funds were in the right account.

Now, the correct recipient is demanding their money R8803, which we don't have.