Watching tv from the grave???

My late sisters account was ***

This payment was due on 1 March 2025 and would have been valid till 28/02/26.

My sister died the 23rd February 2025. I did sent the sabc a copy of her death certificate asking them to cancel her account but I was politly informed that it is still payable. How is this possible? I paid it over several years because she was disabled and count not work. The 2024/2025 and all the others before that was always paid in time and in full