Order not delivered and billed for it by homechoice

I had a very bad experience with HOMECHOICE. I've ordered kids blankets on the 2nd of March 2020. I received a text from the couriers that they will be delivered. But I never received the order. I made a follow up with HOMECHOICE. I was told they were delivered and signed by a person named nkele and they confirmed her ID number and cell number. I don't know the person. The order was delivered to the wrong address. They said they will investigate and get back to me. Nothing happened. I called again to follow up, the lady I spoke to said the order was with the couriers. I asked her how did it happen that it is with the couriers if I was told it was delivered to the wrong address, she said she doesn't have that info. On Saturday I made another follow up, I was told that I need to do an affidavit and send to them explaining I never received the order. How on earth is that my problem if their courier company made a mistake and not me. Now I'm being billed for that, is this even appropriate.. This is unacceptable and I feel of taking this up.