If your account is (violation of policies), you must submit an appeal.
You'll be asked to enter your recovery information, such as your phone number or an alternate email address. If you've set up two-factor authentication (2FA), you might need to enter a verification code sent to your phone or authenticator app. Enter the required information and follow the prompts.
If you've completed the above steps, you should now be able to access your account. As a precaution, it's a good idea to reset your password to something strong and unique. Make sure to use a password manager to generate and store complex passwords.