Useless old SAA is back!

I booked a flight online to travel on the 17th of May, JHB - CPT. Booking done the 14th of May 2023. On the 16th of May, late afternoon, I changed the flight to Tuesday 23 May 2023 online and was asked to pay an additional amount which was debited to my Credit Card. On the 16th of May, I received an email to confirm the change, but they are awaiting payment confirmation. Since then I had no reply. I phoned the 18th of May 2023 at 06:28 AM, (call lasted 12m 51s) the SAA reservations office to check what is happening. The lady I spoke to checked and said there was a system error and the change were not made. She changed the flight to the 23rd of May and confirmed that I was booked. She will ask the accounts department to check what happened and get back to me. I have heard nothing from them further, nor received any emails or SMS's. When I phoned to day, 19th May 2023, I was told by Thandeka there is no booking for me on the 23rd and I was a no-show and need to pay a no-show fee. This is ridiculous how they again start steeling money from people. The old useless SAA is back. Think again before booking them. Waste of time and money. Ridicules, ***********, useless airline as before.