Help!!!

Apple doesn't make unsolicited phone calls. If there was a problem you would be notified when attempting to log in, including when logging into this forum. Also see: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Laugh at them, hang up, and get on with whatever you would prefer to be doing.

Apple doesn’t make these calls.

Apple will “just” lock your account on suspicious activity, and require you to authenticate.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support