Won't pay for a CT scan in hospital when it is a choice of life or death !

My son is on momentum Ingwe plan as he is unemployed and I pay this for him on case of an emergency. On Monday he was taken by ambulance to the Glynnwood hospital as he was in excruciating pain in his leg and could not walk. The doctor thinks it could be a blood clot but momentum will not pay for a CT scan as it is not covered on his plan ! They will cover R ********** .00 in hospital cover but not a CT scan which is R10,000.00. We can't afford to pay cash for this. What if the blood clot ****s him ? Can someone at Momentum please help him ?????.