Impossible to track parcel given information supp**** by courier

On 24 May 2018, I sent a gift to my son in Engeland vir the South African Post office at the Kolannade in Pretoria using EMS South Africa Couriers. I received an International waybill with a customer careline, ********** 02, which does not work. They have a web adress ems.sapo.co.za which takes you to a location that has nothing to do with them. There are telehone numbers for Cape Town Jhb and Pretoria that have high call rates and then drop the line after about 10 minutes. I tried these a number of times. I am concerned about the parcel I sent which has a EMS ********** 40ZA number and a EEE ********** 64ZA barcode number. I am particularly worried about the customer copy number CON 030004. EMS make it impossible to track this.