Google map location - not show map

I am having an event, but the detailed location isn't finalised. The Location setting Google Maps won't recognise the city I've put in, it tells me "We're sorry, but the locations not found". But when I open the event on the web, is shows the Google map, with the pointer in the middle of the ocean (see attached file). How do I stop the Google Map from showing when i don't want it to show?

Also, there is a tab called "Comment", which is blank. How do i remove that?

cheers
Charlie