Which calendar app are you using, on which phone? I use Gmail and basically the stock calendar. When I open the settings on the calendar, I can view 'calendars to display'. I have a couple of calendars, so I can uncheck the one I no longer want to display. I can also log on Gmail via a browser, and disable that account permission via it's settings online. If it's not Gmail, let us know some of the specifics. We hate being stumped! Lol
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