Bad inconsiderate service from KULULA call centre

I booked a return ticket today with KULULA I urgently needed to book this flight for this weekend because I need to attend a family funeral in durban & I had 2 processing errors occur while trying to book my flight & pay with my discovery credit card then I received 2 sms's from my credit card that the amounts went off twice from my card & yet my flight was still not booked I called the call centre & the agent said to me that the flight was not booked & that I should wait for the amounts to be reversed I told the agent that there was no money left in my credit card now & if I wait I will not get THE same flight I tried to book which means I won't be able to attend the funeral and all because kulula is having a technical glitch and they told me Sorry I just had to wait for the 2 amounts to be reversed and take it from there. Inconsiderate and terrible service