Bad service and bad customer care support

I am really not pleased with the response I got from homechoice on my private email. The requirements they need from me are like I'm the one who has made a mistake and they the ones that delivered my order to the wrong address and wrong recepient. Why can they not follow it up with their courier company and make them follow it up and collect those orders and send them to the right person. Now I'm asked to do an affidavit or complete some form, why would I do that if I never received anything from them. Why aren't they asking that courier company to do all those because it was their mistake and negligence. I will not fill up any form nor do an affidavit. I will take this up as it is now reflecting on my credit score badly that I've missed payment. Payment of something I never received. I hope they sort out their mess because I won't stop now.