SCAM - do NOT respond
see how to REPORT this to Apple here
Avoid phishing emails, fake ‘virus‘ alerts, phony support calls, and other scams
Sorry, but you have been scammed. Apple does not send notifications about viruses, and unless your iPhone has been jailbroken, it does not have a virus. That is an adware popup trying to get you to do exactly what you did.
You do not need any anti-virus protection on the phone. I suggest that you just delete the app, and if you paid for it in the app store, I would use the link https://reportaproblem.apple.com and ask for a refund.
Any such popups on your iPhone are scams.
Anything suggested by such popups should be ignored.
Thank you! Had that feeling - you know the one! Cheers.
Apple pop up - virus detected on my phone
