Misleading online bookings

I booked a ticket online for my mum who is75 years to travel from Lanseria Airport to King Shaka on Monday online with my Nedbank Cheque card .The system accepted my card by generating a ref no FLOUSD. Yesterday I tried to check her in but the system was saying "an error occurred'.I tried a few times and it did the same so I decided to call the call centre and spoke to an agent who told me that the ticket is pending and flight is not confirmed. this is not the first time this happen.On the 30ty of April i booked to travel from JHB to DBN and when i got to the check inn counter there was no booking on the system yet i got a ref no WUMZCC and both times the monies came of my account and was not refunded till this day.I had to pay R839.61 which is double to what i booked. This is unacceptable. I feel like I've been ****** . I did speak to the supervisor and she manage to phone Nedbank and get Mondays transaction reversed but could not get the amount reversed for the 30th of April.