FNB TAKING FOREVER TO REVERSE MY FUNDS

On the 28th January i went to FNB Lephalale to transfer funds into my niece account. the following day the 29th when i was confirming if they received they funds, i realized that i used an incorrect account. i immediately went back to the branch to report the matter. the consultant who helped me told me that it is going to take 10 days before i can receive the funds back. 21 days passed without hearing anything from fnb so on the 21st i went back to the branch to find out what is going on? now i am been told that it is going to take the whole month before i can get back my money. i feel like FNB is not taking my query serious. what if that Absa client uses the money? I contacted Absa but they couldn't give me any information due to customer confidentiality. they only confirmed that funds are still in the account. i need those funds urgently because they were going to buy my car parts. FNB DOES NOT PROTECT AND TAKE THEIR CUSTOMERS SERIOUS.