Getting notifications from calendar saying that I have viruses

I have been getting many notifications on my calendar saying “click now to secure your iPhone” “your iPhone might be exposed to a virus” “your data and information is being exposed” etc it keeps giving me these notifications almost 39 times a day and my calendar is full of theses now, I didn’t know how to make it go away so I deleted my calendar app and it is still giving me the notifications even when I don’t have the app. I don’t know what to do, I am scared I have a virus and it is taking my information.