Posthumous awards of the Anglo-Boere Oorlog Medal discontinued

My great grandfather, Gustav Lindenberg, was killed in action at the Battle of Magersfontein on 11th December 1899. He fought in the Scandinavian Corps on the side of the Boers. I applied to the relevant military authority in Pretoria for the posthumous award of my great grandfather's Anglo-Boere Oorlog Medal. I was informed that my claim could not be entertained as my great grandfather's next of kin had not applied for his medal before the cut-off date of 1970, and that, in any event I was a great grandchild and so not qualified and entitled to lodge such a claim. I would welcome further comment on the above. Guy Beckett in Johannesburg, Gauteng, South Africa.