Avon Justine *****ers/******s

2 years ago it came to my attention when I checked my credit profile that Avon Justine claimed I owe them R2900 of which I know nothing about. I contacted them about the problem and they told me to email them an Affidavid, My six signatures on an A4 page, Certified copy of my Id of which I did, but they have done nothing about it this far, They are ruining my credit profile, every financial instituition I try to apply they still appear and it looks like they are not in the mood to solve the problem.