homechoice ruining my credit record

last year June i open an account with home and i took 3 blankets for R3500.end of July i called to tell them that I haven't received the blankets and I was told that they on the way after 2 weeks I sent them an email to let them know that I still haven't received my order and I told him to cancel the order, October i received a call saying i missed a payment then I ask for what because the order never reached me that when i got the shock of my life that the order was delivered and my sister signed on my behave "the sister I don't have " and I never received any call from the delivery guy.i told that person that the order never reached me then he said that i must do an affidavit and send it to them so that they can open a ***** case all of that was done but December they handed the account to the laws and when they contacted me I explained everything and sent them the email with my affidavit then they disappeared. this year again they handed me to the laws when I explained and send them the prove they disappeared too. my worry now is they are ruining my credit score and how can i pay for something i never received