If you have accidentally deleted your org or project, unfortunately, it is not currently possible to restore an entire org or even a project. We have added additional measures and confirmations with warnings to ensure that a user is aware of the action that they take and the consequences associated.
We sincerely apologize for this inconvenience and appreciate the gravity of the situation if you've made it to this article. We have explored the possibility of an entire Organization restore in-depth with our engineering team; but currently, we're unable to reliably restore the data with any level of confidence. The same applies to deleted projects.