If your account was compromised, it was because someone was able to access your facebook account or had access to your device. If your facebook account was compromised, please change your password immediately by following these instructions:  
 
 
If your account is still compromised, then please follow the instructions listed here:  
 
 
Finally, if you believe it was because someone had access to your device, it is recommended that you increase your device's security settings by installing a lock screen and password by following these instructions:  
 
Apple:  
 
Android: 
 
Any chips, progress, or other data lost due your your account being compromised will not be able to be recovered.