2 years ago I was looking at open homes and clicked on an LJ Hooker link to add open home appointments to my calendar.  It appears to have made 2 new calendars that I can see on my android calendar, but not on my Microsoft Office calendar.  I cannot see a way to delete it.  I have mostly ignored it, but now I click on a link in the Air NZ app to add flights to my calendar and they add to the LJ Hooker calender, not my default work calendar, so I can't see those flights on my work computer.  My google-fu must be rusty as I can't see a solution...

Any else come across this issue?