Virus

Hello, I use an iPhone 8 Plus and I have been receiving many notifications from my calendar saying “missed a video chat with (a person that isn’t in my contact list) and other types of notifications and I can’t delete them or edit them. Attached is a screenshot of what I see. I am not sure what it is but I think it is a virus. This has never happened to me before and I’ve been using an iPhone since forever. Could you please help me with how I can get rid of it?

thank you,

Sophia Toyas