I can't pay for items I never got

I used to sell Avon I stopped because they want me to pay for items I never got, I called them and they told me to put it into writing which I did and they told me I didn't do it right, I told my leader about it, she did it for me but then they said I complained 20 days late, which is not true, I complained as soon as I got my box and they sent me back and forth , the consultants were irritated by me and my husband and told us we didn't do whatever it is that we had to do right, now they're calling me everyday to pay for the perfumes I never even got, who's supposed to pay for them? The customer never got them and I never got them,from who's pocket is the money gonna come from? They say they record their calls ,so why don't they go back to check when it is that I started complaining about the shorted items or ask the packer that packed my order where their perfumes are, because they were never in that box.