How to clear the short messages in the calendar inbox?

In Apple's mobile phone icloud, turn off the calendar option, and the spam messages in the calendar inbox will be deleted, and no spam messages will be received again.

Tools/materials: iphone 12, ios 14.7, setting v3.1131524, calendar 2.0.

1. In the settings of Apple's mobile phone, click Personal Account.

2. click iCloud.

3. Turn off the calendar option, and the calendar inbox will not receive spam messages.