Cannot delete shared calendar
About a year ago, someone shared their calendar with me and lately I have been receiving notifications for it. I have tried to delete the calendar several times (probably upwards of 20-30 times) and it keeps coming back (not asking permission to be added again, just appearing back up in my list of calendars). I have also tried just "unchecking" the calendar and not deleting it, but this does not work either. I have tried logging onto iCloud to see if I could force a delete this way but it was shared with my gmail which is then linked to my apple calendar. I do not know what more to do to get this to go away.