Super disgusted

Myself and my wife paid our deposit in June last year for our cruise from cape town to walvisbay. In December my wife got very ill and we also found out she has cancer. She is currently in chemo treatment. We forwarded all the documents to MSC stating why we can't go on the cruise and that my wife will be in chemo treatment. They refuse to pay our deposit back because my wife is not hospitalised during the cruise. Now my question is do they want us to take the chemo doctors on the cruise because of her being in treatment. I am super disgusted with this company and I will strongly advise anyone not to use them