I sent 3 packages for fba and 4 of them is missing. Inventory Ledger shows that they have been recieved at first but all lost while transfering from Fulfillment Centre to another one. It is not enough for reimbursement?

UPS made random mistake and 1 of 3 packages has no delivery proof. But both amazon and me know missing inventories are not belong to that package. Is it fair that amazon tell me bring delivery proof for inventories that Amazon Inventory Ledger says amazon recieved inventories but lost at transfer between Fulfillment Centres?