Swiss Air cost me thousands of Rands

I was supposed to fly from JHB to Switzerland in December however when I got to the check in at the airport I was told South Africans were still banned from entering Switzerland and hence could not board the plane. (This despite there being clear indication that the red list ban for South Africans had been lifted)

They were extremely unhelpful at the airport counter. They said they could not assist further and that I needed to go to their website to find out how I could proceed. After numerous efforts to reach their call centres (takes them over 30 minutes to answer any phones and days to respond to mails.) I finally reached a call centre agent who was extremely rude and went on to mention that it was actually my fault I couldn't board and I should have checked with my local embassy and hence will not allow me to obtain a voucher to to move my flight or a refund. This is irrelevant as all my documentation was in order. The reason given to me at the check in was that South African's were still banned from entering Switzerland due to COVID restrictions. Outside of the extremely unprofessional and poor service experience, this has cost me thousands of rands and numerous hours of my time trying to resolve. Ultimately really disappointing that an international airline of this stature could behave in such a disgusting and unprofessional manner.