Yet another Fedex Clearing Disaster

Waybill *** This shipment was sent from New York on the 4th December, with a week's predicted delivery time to my offices in Johannesburg There is supposedly a 'clearance delay', but questions supposedly being asked by customs are - Proof of payment, and proor of order confirmation?? All stalling tactics quite frankly, as in all my years of importing goods I have NEVER been asked these questions. Needless to say, the parcel has still not been delivered, and in my experience, this kind of nonsense is usually indicative that the contents of the parcel have been tampered with, and that the parcel has now disappeared. Can someone kindly let me know where my parcel is, and when it will be delivered? Unfortunately Fedex are so effiicient everywhere else in the world that my suppliers insist on using them, but sadly I generally have nothing but bad experiences with them on the South African side.