Missing parcel and lack of communication

Fedex claims to have delivered a parcel of mine which I did not receive. Be it ****** or not delivered I haven't received the parcel. I opened a case about the missing parcel. Received one call back shortly after making the case and was told that the driver would contact me directly. Waited over a week for a phone call. Went online to view the status of my case only to see that it has been closed without any further investigating being done. Very disappointed with the level of service