Refusal of authorization

Few months ago my doctor attempted doing a procedure to insert a device in my body in his room but my body couldn’t hand the pain for it to be successful. Therefore he wrote a motivation in order for this to be done in hospital using the theatre facilities in order for me not to feel the pain. Discovery did not reply to myself or the doctor and when I enquire they said they will only pay for the device and the doctora labor from my day to day funds and I will have to pay for the hospital bills from my own pocket.