Not possible to contact Budgetair in an emergency

I bought a return ticket for my husband from Windhoek to Cape Town, departing on Sunday 29 July 2019. My husband developed a seriously bad flu on the Saturday. I tried to call Budgetair on the Saturday afternoon to change the departing ticket to Monday, but there was no answer at either the emergency phone number in Amsterdam or the Johannesburg number. I again tried on the Sunday morning. I also called Namib Air, the operator, but they only said that the change must be through the agent. My husband was in no condition to fly as he had a high fever. I had to buy a new ticket through Air Namibia and he left on the Monday. I continued trying to call Budgetair and sent them two e-mails. When I call Johannesburg, I just get an automatic reply that the network is busy. When I call Amsterdam, I am automatically put on hold indefinitely. Air Namibia cancelled the ticket as he did not show for the first flight, even though I called them beforehand. When I tried to check him in for the return flight, I was told that he should be at Cape Town airport 3 hours before the flight to arrange for the ticket to be re-activated, but they simply forced him to buy a new ticket. So, all my attempts to contact Budgetair was unsuccessful and I lost the cost of a return ticket.