How to delete calendar

Hello, I cannot get rid of two moon calendars I added (.ics).
I deleted using right click > remove. But events are still there showing this year and past years.

you can delete those events in “Agenda” view.

yes I started to delete, but there are so many… years 2007, 2008!

Ok. I deleted all from 2007 to 2015!
Thanks. Have a nice sunday.