How to restore home-assistant systemctl service?

Basically I’m unable to start the homeassistant service after I’ve reloaded systemctl.
The error is:
Failed to start [email protected]: Unit [email protected] failed to load: No such file or directory.
I’m using Hassbian which worked fine until the console said something like:
"Some file where changed and a service reload should be made use sudo 'command-i-don't-remember'"
After the reboot HA didn’t autostart and I’m unable to start it manually. Is there a standard service file I could use to restore it or there’s no other way than reflashing HASSBIAN and start from scratch?

This means that systemctl cannot find the file that is supposed to start HA. Please show us the systemctl file by typing the following.

$ cat /etc/systemd/system/[email protected]

cat: /etc/systemd/system/[email protected]: No such file or directory
However I’m going to to reflash the the sd because it’s the easiest and more efficent way. Thank you for the support.