Shocking customer service

I am absolutely appalled by Standard Bank's customer service. Today, while trying to make a purchase, my card was declined. The assistant cancelled the transaction and suggested that we try and insert my card rather than tapping it, for a second time, my card declined. I expressed my concern to the assistant as I knew for a fact that there was money in my account. I saw on the card machine that it said that my card was restricted. I immediately phoned Standard Bank's customer careline where I was then informed that my card had been blocked (without prior notice being given to me) due to my card being a Visa card and Standard Bank no longer working with Visa cards. I informed the lady that this does not make sense to me as my card only expires in 2031. This is now the second time that my bank card has been blocked without notice being given to me or without my consent. I do not understand how this can be allowed or is acceptable. Being the customer whose card has been declined, knowing full well that there is sufficient money in my account, is completely embarrassing. I am now having to receive a new card when there was absolutely nothing wrong with my other card and I am having to be inconvenienced yet again by having a card that is blocked. I find this to be totally unacceptable and unprofessional.