Postnet Westgate

I am extremely angry and disappointed as I placed an order through an international company based in China. My parcel was then delivered at Postnet Westgate on Friday 14 January 2022. Upon me collecting my parcel I was then told that I had came and collected the parcel which was not true, someone went to the store, forged my signature and gave them an incorrect ID number which does not belong to me. I was then told to go get an affidavit documenting everything that had happened and to submit the prove of purchase which I did. I am now receiving a call from the store manager of Postnet Westgate telling me that their insurance company has declined my claim and that the boss of the store "would be able to refund half the money I paid for my item" What I am not understanding is how is it my fault that they were *********** and gave my order to someone else because upon collection of any item an ID needs to be provided, the ID that was provided in this case did NOT belong to me so how do they give the order to someone else seeing the ID does not belong to me.