Google has removed the option to close your GPay account in India on iOS devices. Customer support confirmed that you cannot delete a GPay account anymore. All your transaction history cannot be wiped from Google services which was possible previously. The only way to do that is delete your entire Google account.
who cares? how often do you need to close your gpay account? maybe like a once in a decade or few years kind of thing. just get a new credit card and move on. not everything needs to be an outrage.