FNB Cannot rectify an EFT error.

So severely dissapointed in service or lack thereof by FNB. On the 25th I paid an amount of R7500 into the wrong account. The very next day I completed forms to have the eft reversed. They send me an email the same day saying it was declined because FNB does not have authority and the party who received the money needs to go into the bank. I need this resolved asap. It is MY money which I need to run MY business. I refuse to believe an error so small can not be rectified. I had the recall division contacted and I have comp**** yet I get nowhere. My ref. No. ***. Such a dissapointment and the call centre in that department have a real lacklustre attitude.