FNB Harrasment

I keep on getting phone calls from FNB stating that I owe them monies on a credit card. I have not done business with FNB since 2006 which is 16 years ago. I have a court order stating that I was placed under sequestration and I have rehabilitated myself. How can you keep on harassing me like this? Phone me and ask me to verify my ID number, which is something that I will not do with all the ***** in this country. If you have all my details, then why don't you confirm the details that you have with me? Why must i provide my ID number? Stop phoning me and take me to court, I will then prove to the courts that I was sequestrated and you should have claimed against the estate.