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If you're unable to recover the account on your own, you can reach out to Facebook Support directly.1-866-554-3839 Use the Help Center within the app or website to report the issue. You can also contact Facebook through their support phone number, 1-866-554-3839, though response times may vary.
In cases of serious security concerns, 1-866-554-3839such as identity theft or unauthorized financial transactions, consider reporting the incident to local law enforcement as well.