flyvelvetsky.comは安全ですか？

I have booked a ticket for myself and an employee to fly back from Cape Town to Johannesburg. Subsequently my employee can't go anymore and I must take someone else with me to Johannesburg. When I wanted to change his details I couldn't do it since they don't allow it and I should have read this in the terms and conditions. (My mistake on not reading this and I won't make this mistake again) No help, no understanding and no effort from Velvet Sky to see if they can actually change this. If I can make a recommendation - NEVER EVER FLY WITH THESE GUYS - CLIENT SERVICE IS NOT ON THEIR AGENDA AND THEY WILL RATHER MAKE THE MONEY THAN HELP YOU IN CHANGING A NAME ON A TICKET!