Secure code not working when trying to access Facebook

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My FB account was hacked. I had to provide ID to get email changed to be able to receive the secure code to log into FB. Secure code was received but when entered into the app I get “unknown error” and when using url in email from FB I receive msg that I’ve attempted too many times and to try again later. I’ve waited 24 hours on multiple occasions and same message. It has been 5 days and no luck. Please advise