I have a non resident bank account

I have a non resident bank account. As FNB made a mess of two wires I sent from Italy, a month ago I gave R4000 cash to a friend who wired it to my account. In order to clear the amount, I was asked for a proof of source of funding, which I delivered to a branch. Then the story becomes unbelievable. I was told that as a foreigner I cannot receive any amount in rand and that I had to fill a form to have the money sent back. If that is true, why was I asked for a proof of source of funding? In a surreal call I was told that FNB cannot send the money back as it doesn't know where it comes from. By email they are now asking me to provide: A bank confirmation letter from the sender’s bank and a proof of payment showing the amount transferred to my account. Doesn’t FNB know how much? I have already wasted enough time: three times in person, countless messages and calls. This is not a bank, it is a black hole. Worst banking experience ever. Do I need a lawyer?