AVON IS *********** TO RESOLVE LOST BOX

I placed an order on 2/12/2014 with Avon which was not delivered. I placed another order on 12/12/2014 to replace that order. I collected that order at the courier depot on 18/12/2014 as there was nobody at my delivery address to accept delivery. Avon says I collected the 1st order at the depot. On my account profile there is no waybill nr connected to the order of 02/12/2014. The waybill nr that I signed which they sent me a copy of is connected to the order of 12/12/2014. I have asked them for proof of acceptance of both boxes but they can only submit 1 signed waybill. This is not acceptable for me as I think Avon is *********** to resolve this matter. Avon blames the courier company Fastway Couriers and the courier inisists that they did not receive this order from Avon.