Refund still not processed for terminally ill patient (Stage 4 cancer)

My Dad's medical aid (Anglo American), is underwritten by Discovery Health. My dad is an advanced stage 4 cancer patient. We have had endless issues with his billings, resulting in him settling a number of bills out of his own pocket. My dad cannot talk as he has head and oral cancer. Furthermore, my dad is a pensioner and his only source of income is the state grant. As a cancer patient, undergoing treatment, he needs weekly bloodworks. He had to fork out R3.7K for shortfalls, which should have been allocated to his Oncology cover. We have received no relief from the medical aid and the lack of response regarding this refund is appalling. Please arrange for a refund as this treatment towards my dad (considering his very frail state) is *********. No terminally ill patient should be treated in this manner.