Intellectual property used without payment.

NB Publishers , a media 24 company, used my creative writing (poems) in school textbooks. For the relatively small amount (several hundred rand), the company has put forward new requirements (additional proof or affidavit documents) each time I request payment. I need to submit as much, if not more, "proof" documents to NB Publishers than if I were selling my house. The latest requirement is a BBBEE sworn affidavit in which I -- a mere individual - must confirm whether I am 100% black owned, 51 % black owned or less than 51% black owned. The matter is dragging on for over four years.