I'm seeing spam or events I didn't add

Events you didn’t create — spammy invitations or entries that seem to “push” themselves into your schedule — don’t come from Calendar Op.2. They arrive through the iOS Calendar, usually from a subscribed “spam” calendar or an unsolicited invitation.

Remove the spam calendar

1. Open the built-in Calendar app → tap Calendars.
2. Look for a calendar you don’t recognize in the list.
3. Tap the ⓘ next to it and choose Delete Calendar / Unsubscribe.

Important: don’t tap “Decline”

For suspicious invitations, don’t tap “Decline” — doing so confirms to the sender that your address is active. Instead, remove the associated subscribed calendar as above (and report it as junk if iOS offers that option).

Once the source calendar is removed, the unwanted entries also disappear from Calendar Op.2, since it simply mirrors the iOS Calendar.