Amazon Lost my item, say they never received it, I have proof via Inventory Ledger.

I sent in about 30 items in 2 separate shipments. In one shipment 1 item was lost and in the other, 3 were lost. I have filed numerous complaints and sent in proof of both ownership and a screenshot of the inventory ledger, clearly showing the item being in the warehouse for ~4 days then randomly disappearing. For the second shipment with 3 missing items, this was a RA find so I have lost hope as they seem to not accept those receipts as proof. Not sure why this is happening, especially when I’ve done the hard work for them.