Transfer of plane ticket to Mauritius

After we booked and paid in full our trip to Mauritius, my husband fell a few days ago and injured his hip badly (3 weeks before our departure) which resulted in the fact that he cannot go with us on holiday anymore. I contacted Just Mauritius - consultant Haylee - to inform her of the incident and if she could please transfer the plane ticket to my sisters name so that she can go with us in my husbands place. I was just informed that I would have to buy a new plane ticket for R11 195 and later R9 695, and that I will not be refunded for my husbands ticket. If at all I might get a portion of the airport tax back. It is now 30 hours later and still I am not able to get an answer from them as to what the refund on my husbands ticket will be. <br> This is totally unexceptable to me. I am not asking to refund the R17 000 paid for my husband holiday trip. I am merely asking a change of name so that I can take someone else on holiday with us. And the reason is not just this or that. It is because of an accident which we could not prevent<br> We are departing on 10 July, I hope you can help me<br>