FNB Home Loans - unsupported Credit listing!

I recently checked my credit profile and was shocked to find that I was listed by FNB Home loans to be 10 months in arrears. I do not avail of a FNB Homeloan. There was a dispute some time ago and FNB Home loans could not furnish me with any documentation to support their claims. They blatantly ignored our request. After numerous sms threads of the sheriff being on his way to attach my assets, I appointed an attorney. Numerous letters from my attorney was also just ignored. How can I be in arrears for debt FNB refuses to prove. My next step is to approach the NCR for assistance.