Events Calendar – Archive

Hi - website: www.wymondhammethodistchurch.com I set up a page drop down from Town Green Centre called What's On and have installed the events calendar for that page. However, it is showing up as Archive: Events on the image - and I can't find the events page to change the image either? I've changed it on the What's On page but that's not having any affect. It does say this on my dashboard: The Page "What’s On" uses the "/whats-on" slug: the Events Calendar plugin will show its calendar in place of the page. How do I remove the text Archive: Events and change the image for it - is it stored somewhere else other than a page? Thanks Marianne