Unacceptable Service from Standard Bank Claremont

In March I went into the bank to set up a debit order to pay monthly rental to my agency starting 3/4/15.On 27/4/15, I received an email from my agent stating that double rent had been paid on 8/4/15. I immediately went to the bank (SR No ***) to enquire about the double payment.The clark advised me that this was a mistake and that I could either ask the agent for my money or that the bank would reverse the transaction and the money would be returned to me by 13/5/15. I asked for the latter.On 12/5/15 I returned to the Bank to collect a card that I had been waiting for since February 2015.(This is a separate issue where I was also utterly disappointed by Standard Banks service).While I was there I enquired about the status of my money. I was advised that the process was going to be expensive and it would be easier for my agent to pay me the money directly.This insinuated that nothing had been done until now. How can the bank just take my money and do as it likes without paying it back...