Very poor customer service.

I settle my FNB credit card in November 2020. Its been 4 months now and they claim they did not receive payment. Even after I send them the proof of payment and also my November bank statement as requested by FNB were it shows the payment going off. I got to keep phoning them and all I get told is the case has been handed over to the Recovery department/ ***** department and is busy been looked into. This is really very poor service from a Bank that is quick to take your money but cannot sort out an internal problem. I will never deal again with FNB and have advise all my friends and family to never open an account or use FNB. I have now taken this matter up with the banking Ombudsmen. I hope I can get results after this.