iCloud compromised
I received a call from an 800 number saying my iCloud account was attempted to be accessed in England and South Africa.
I suspect this call was not a legitimate call from Apple. Can you confirm?
Apple does not make such calls.
All such calls are scams from criminals attempting to steal your personal and financial information. The callers will often use number spoofing to pretend they are calling from a legitimate business. The correct course of action is to hang up on them, repeatedly if needed.
Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support