Hacked iCloud
My iCloud has been hacked and deleted, what can I do?
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Best reply
Sounds like you’re in a bad situation.
This article should be of some assistance.
If you think your Apple ID has been compromised - Apple Support
Going forward, you might also find these two articles helpful as well:
Use the built-in security and privacy protections of iPhone – Apple Support (AU)
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support