MY DECEMBER EMS ORDER STILL NOT DELIVERED

MY INTERNATIONAL PARCEL ARRIVED IN SOUTH AFRICA BEGINNING OF JANUARY AND SINCE THE 6TH OF JANUARY IS STILL AT THE EMS DELIVERY OFFICE, MIND YOU I PAID A LOT OF MONEY FOR THIS AS I NEEDED EXPRESS DELIVERY, ITS BEEN ABOUT 4 WEEKS NOW ITS STILL LYING AT THE POST OFFICE AND NOT DELIVERED, I HAVE CALLED ALL THE NUMBERS GIVEN TO ME BUT THERE IS NO ANSWER, I DID ONE EMAIL ENQUIRY FOR WHICH THEY RESPONDED WITH A NEW TRACING CODE AND NOW THEY ARE NOT RESPONDING, I DONT KNOW WHAT TO DO NOW, IVE LOST MONEY AND IVE DEF LOST TIME.