Pathetic Service

I had changed the bank that I bank with in April 2022 and have been trying to update my new banking details with Standard Bank credit card division since then. I have been on numerous calls with their call center, all of which insist that my details have been updated, only to receive sms's stating that I am have failed to pay my bill. All the while incurring interest on an account that reflects unpaid, which I am also expected to pay. This feels like ******ion - how is it possible that not a single person at Standard Bank can update basic information?? It's shocking how customer service in SA is at the bottom of the priority list.