Bad service, lose tickets & week holiday Cape Town

I want Mango to solve my problem. They keep on putting me through to answering services and don't answer their phones.<br> No one comes back.<br> My wife and daughter arrived a few minutes late and they refused them to board the plane. Apparently all the flights are full. If there is an open space it will cost R2000 but they say it is fully booked till after their return flight date. They lost the tickets and return flights as well as a week holiday in Cape Town. <br> No one answer the phone at head office. It just keeps on ringing.