Voyager useless,confirmed booking cancelled- Twice

On 18/03/15 I booked 4 tickets using Voyager miles, from Cape Town to Johannesburg. This was necessary after I received a call on the day stating that I have to make a telephonic booking and payment,as my previously confirmed booking had been automatically cancelled by the system!!!<br> The booking was done, again, and a confirmation of the booking, stating among other the method of payment, was sent to me. <br> Upon trying to book in online today, 24 hours before our family vacation, no reservation shows up! <br> How do I trust an airline who can not even manage a simple booking, to deliver my family and I safely to our holiday destination? And how many times do I have to redo the booking before we can actually be sure of a seat on the plane?<br> This has cost us hours of frustration, stress and unhappiness, and has a financial implication, as my husband had to cancel patients to accommodate the earlier flight that we were forced to book,( due to unavailability of seats on the original flight). Only to be told today that we might not be able to spend Easter with our family...<br> I will no longer have anything to do with Voyager,have cancelled our Diners card loyalty programme, and suggest it to all.