Disgusted and furious

I booked tickets to Durban from Lanseria a MONTH in advance. It's Christmas day, all I wanted was to spend some time with family back home, but kulula had to mess up royalty and could not find my booking although I had invoices, receipts and a bank statement as proof of the booking, as well as a booking reference number and also emailed booking confirmations. The money was taken out of my bank account. I get to the airport which cost me 700 rand with a cab. So after calming down regarding this issue and PAID AN EXTRA 402 RAND BECAUSE OF THEIR INCOMPETENCE, we are told that the flight is fully booked, the flight that we paid for, twice! Then we get transported to OR Tambo airport to board a British airway flight for 15:35. When we get to Tambo, they tell us that the flight is also fully booked and we have to wait until 5pm for the next flight! I am utterly disgusted at kulula for taking entire Christmas day in this manner. Surely a company of this magnitude should have proper systems in place! I am going to take this further and perhaps even get my lawyers invoked if I don't recieve any feedback and most importantly the extra ticket money and transport costs refunded back to me in full!