DSTV multi choice de*****ing pensioners

DSTv multi choice called my father (pensioner) on the 12 Sept requesting premium payment of R900 and something, multi choice claims he canceled the subscription. Why would he do that after so many years of rendering multi choice services. whereby multi choice normally debits his account on the 15th of every month and he only pays R400 and something. Their viewing was cut then, on the 15th multi choice debited his account and the viewing was back on. Today 20 Sept their viewing is cut off again and multi choice requested he pays (AGAIN) multi choice you need to stop de*****ing pensioners, attend to this problem or we switch to another service provider