Reset password with no WiFi

Hello, Emkimem.

Thank you for using Apple Support Communities.

From your post, I understand that you're unable to reset the password so you can log in to your MacBook. I'd like to help. Since you have FileVault turned on, have you tried these steps? Change or reset the password of a macOS user account

"Reset using your Recovery Key (FileVault must be on)

If FileVault is turned on and you have a FileVault Recovery Key, you can use that key to reset your password.

1. At the login screen, keep entering a password until you see a message saying that you can reset your password using your Recovery Key. If you don't see the message after three attempts, FileVault isn't on.
2. Click  next to the message. The password field changes to a Recovery Key field.
3. Enter your Recovery Key. Use uppercase characters, and include the hyphens. 
4. Follow the onscreen instructions to create a new password, then click Reset Password when done.
5. Determine whether to create a new login keychain.

If you can't log in with your new password after restarting your Mac, take these additional steps:

1. Restart again, then immediately hold down Command-R or one of the other macOS Recovery key combinations until you see the Apple logo or a spinning globe. 
2. When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
3. In the Terminal window, type resetpassword, then press Return to open the Reset Password assistant pictured above.
4. Select ”My password doesn't work when logging in,” then click Next and follow the onscreen instructions for your user account".

Let me know if this helps.

Cheers!

Hello, Emkimem.

Thanks for getting back to us on this and taking the time to try those steps to reset your password. Since you're still unable to reset the password, the recommendation from here is to contact Apple Support.

Cheers!