Zero stars if I could. Next step ombudsman

Made a payment to an FNB credit card holding ***, but accidentally used the wrong reference number. As a result the funds were never allocated to my credit card and FNB is sending me pillar to post, back and forth and no one can help me. Its been longer than a month (27 Sep 2022) and FNB sits with R4000 of my money in their own account and simply not returning it to me after filling out reversal request forms and talking to useless, unbothered staff. I want my money back and when I get it back I will be closing my account. Worst bank in Africa!