Hacked?
I got 2 calls from an 800 number saying my iCloud was compromised. How do I know if this is legit? What do I do if it has been compromised?
Such calls are scams from criminals attempting to steal your personal and financial information. They are criminals. Hang up on them.
Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support