Bank in cahoots with Microsoft

I am informed by my local branch that Standard Bank will no longer support Microsoft XP for Internet Banking. It is mind boggling that a bank that is supposed to be there to serve its customers can make this sort of decision without informing its customer. As a pensioner am I now supposed to go out now and spend many thousands of Rands to buy the latest Microsoft operating system? Standard Bank must be in cahoots with Microsoft to swell their bulging coffers by forcing its customer to buy new operating systems !