No bounce back from closed account

I mistakenly paid an amount of R 500.00 into a closed account of my brother at FNB. According to Absa , my bank, such transaction to a closed account should bounce back into my account within 3 days. I transferred the money on 18/04/2018 at 11:41 and tried to reverse the action at Absa, but they said after I send an E:Mail to ********** they will reverse the payment(from a closed account) to my account. This action will cost me R 160:00. This is just not acceptable.