There are a few things you can do to try to fix a restricted Facebook account:

1. Review Facebook’s Community Standards. Make sure you understand and follow Facebook’s Community Standards. If you have violated any of the standards, you may be able to request a review of your account.
2. Request a review of your account. To request a review of your account, go to the Help Center and search for “restricted account”. Then, click on the Request a review button. You will need to provide your full name, email address, and a brief explanation of why you believe your account was restricted.
3. Wait for a response from Facebook. Facebook will review your request and determine whether to reinstate your account. Once your request has been reviewed, you will receive a notification from Facebook.