I want my money back

I mistakenly sent money to the wrong beneficiary but emidiately requested my bank to reverse the funds before they cleared, to my surprise i get feedback stating that there is insufficient funds in the recipients acc due to charges i cant get the money back. My concern is that why must i be held liable for the persons debt and i had requested the reversal prior to the amount leaving my account. Now im told i cant get my R7000 back i feel its unfair and *****ed im sending this to the ombudsman. I want my money.