Ongoing Problems with Tracy, CA Hub, Now Package of High-End Item Missing

We have had a package pending delivery in Tracy, CA for a month. Despite numerous phone calls and even an offer to drive to Tracy to pick up the package, we still have not received our high-end item. As of today, the package has not been scanned, so will be considered lost by FedEx...because we have tracked this package's progress (or lack of progress) continually, we were told at one point that our package was in the QA cage (this would have been the third time we were told that the package would be on a truck the following morning). When we were told two days ago that unless the package was scanned by 8/6 it would be consider lost, we again passed on the information that it was in the QA cage. It hasn't been scanned, so I'm assuming that FedEx is willing to just eat the cost of the item rather than look for it - over $5,000. We have had continual problems getting our packages delivered but this is the first time that one has actually vanished while we watched it progress.