ACSA Parking Systems are USELESS

ACSA encourage users to pre-book underground parking at OR Tambo. All good and well but their systems do not work. We booked to park for a week and paid months before our travel. We got to the entrance and a helpful employee told us the system was not working and not to insert our Credit card to gain entry - "simply take the ticket and when you leave insert the ticket and call the office via the communicator on the exit boom and quote our Reference number on our booking". Simple one would think. We return and do as instructed. The lady who answers the call tells me there is no such reference number on the system and I should read the correct number. I re-read and she tells me I do not understand and should remark and "come up to our office so I can show you what I need". I refuse as the staff member who was at the gate tells her my details are correct. She tells him that he does not understand either. Ends up their system dumps all data if you book more than six weeks in advance. It took us 25 minutes to get her to open the gate. I will never use their parking again - rather pay for a shuttle and pay extra. This is the third time I have experienced problems in their ba*****t parking getting out. Really - get it right ACSA!