Unfair company collection amount.

I just found out that Duplessis & partners put my name under judgment. I called the company and spoke to Chardine in Bloemfontein offices. She mentioned that I owe one the Doctors that I dont even remember 4795.31. When I check the judgment amount its 1800 something. I feel that the company is not doing any justice to me coz if that Doctor really took the matter to them there must be no interest to what I owe the doctor. Their number ***. And my number *** Anna Leeuw