FNB Black Lists for a 14 year old Credit Card paid under debt review

Black Listed for a Credit Card from 2008 which was paid under Debt Review years ago. I was listed Black listed in March on Experian for a FNB Credit Card from 2008 that was paid under the debt Review process. My debt review was cleared and taken of my name a few years back as I have paid all my debt listed under it including this Credit Card. I tried to contact FNB regarding this, but you don't get a hold of them. I got a hold of lawyers (Groenewald Lubbe and Symington de Kok Attorneys) working with this Card they said I owe R82 000 on the Credit Card. When I asked what the handed over amount was they send R36 000 and I paid R29 000 of the card but there is still and amount outstanding of R82 000 this is Interest & Fees. I have been to two FNB branches and have made calls and sent email for the past 7 months to try and get this sorted out because my work requires me to heave a clean credit record which I had for years until March of this year. On my credit report it says that I am 8 months in arrears on a Credit Card from 2008??? I have even offered to pay R20 000 out of desperation just to clear my name else I will lose my work at the end of this year. Still FNB will not except this I don't know what to do how can a Bank list a Credit Card that is 14 years old and has been paid on you Credit report saying it is 9 Months in arrears how is this Legal. They playing with my livelihood and have a don't care attitude.