I'm sorry to hear that your Facebook account was disabled even though you claim to have not violated any of the platform's community standards. Facebook's automated systems sometimes make mistakes and disable accounts erroneously. If you believe your account was disabled in error, you can try to appeal the decision by following the instructions provided in the notification you received from Facebook.
It's important to provide as much detail as possible in your appeal, explaining that you did not post any inappropriate content and that you believe there has been a mistake. Facebook will then review your appeal and if they find that your account was disabled incorrectly, they may reinstate it.
In the meantime, make sure to secure your other accounts and consider enabling two-factor authentication to prevent unauthorized access. I hope you are able to resolve this issue and regain access to your account soon.