First of all I want to offer my sincere condolences. I was on the same cruise, had internal bleeding on the Indian Ocean crossing and was put off the ship in Mauritius. The ship's hospital has limited facilities, basically designed to stabilize a patient until they can be off loaded to a bigger facility.
I was in the hospital in Mauritius for two weeks. Carefree kept in constant contact and arranged for my medical evacuation when I was "fit to fly." I may have liked to go home earlier but the decision of the doctors and Carefree was to wait until they were sure I would survive the repatriation. They handled the reservations, made sure I had wheelchairs in Dubai and Seattle where I changed planes.
I am sorry your experience was far worse. But I trust the medical department of HAL. They did what they could (and kept me alive) until they could get me off the ship. They found a good clinic and both HAL and Carefree were on the phone with me almost immediately. The Embassy should be able to help you get the remains repatriated. But the suggestion that you involve a member of Congress, offered above, is not a bad one.
Take Care and be strong. I know the bureaucracy you have to deal with is frustrating.