Debt Collection On Prescribed Debt

I have been contacted by Groenewald Lubbe Attorneys regarding an African Bank Loan, I have informed them on many occasions that this debt has prescribed and provided them with proof but these *********** people are not getting the message and keep on harassing me with calls, SMS, and emails. Even my credit record was cleared when a complaint was lodged with the various credit bureaus. I now had enough and this will be my first media complaint and I will not hesitate to take it even further.