FedEx has lost my package

I have recently ordered an item from USA,for delivery to my home in Secunda,of which the correct adress was included.However,the package has been misplaced by FedEx.I am sending multiple mails to them,requesting the whereabouts of my package and no clear response.This is really terrible service from a supposedly world class delivery company...If there is someone competent to handle this query please assist,or refund me my money... ***