Open Settings
Tap Advanced features
Tap Bixby key
Select Double press to open Bixby
Turn off Bixby Voice
Open the Bixby app
Tap the three-dot menu
Tap Settings
Turn off Bixby Voice
Turn off Bixby Home on the home screen
Remove Bixby from the home screen by long-pressing the home screen and disabling the Bixby Home panel
Disable Bixby notifications in Settings
If needed, sign out of your Samsung account in Bixby settings