Poor services

Good day I decided to close my account. Within the pending closure I decided to open my account again. I phoned old khaki they advised me over the phone that I must send them an email because it's pending closure and not closed yet. I followed up again and have spoken to a lady at their call center that everything is sorted now and they have removed the block. I have asked her 3 times and she said yes. The next day I decided to go to the Tygervalley mall and purchase some items. And the till point I was told my card declined. They then put me on the phone with the call centre who then said that my account is closed. By now the whole store was looking at me and my children. I never felt so embarrassed. I needed to return the stuff with a red face and people starring at me. I have sended a complain to their complains team with no responds from them.