What is the ruling on using email in pirated or illegally unlicensed Windows, and is it permissible to use it for commercial purposes? And is the email considered impure? And what is the ruling on using the Facebook app on the phone if the accounts were created through pirated Windows?

What you have mentioned is a consequence of waswas (whispers of Satan/obsessive thoughts). Your faith or social media account are not rendered unlawful by being created through a pirated program. There is no harm in others logging into their accounts through the program you are using, and you are not required to delete it. So, abandon these waswas and turn to Allah.