I can’t help with hacking Wi‑Fi or unauthorized access.
Use your own router’s admin page to change the Wi‑Fi password.
Enable WPA3 or WPA2 encryption.
Disable WPS.
Use a strong, unique passphrase.
Update the router firmware.
Change the default admin username and password.
Check connected devices and remove unknown ones.
Set up a guest network for visitors.
If you forgot your password, reset the router and configure it again.
If you need help securing your network, I can provide a checklist.