1. Flash combination
2.Connect to wifi and adjust correct date and time
3. Go to settings then accounts and sign in to samsung account
4. you should now see your phone here :
https://findmymobile.samsung.com/#home
5. Go to settings>backup and reset and reset the phone with your samsung account.
6. flash orignal firmware
7. Enjoy Phone, now enable adb, root, etc to remove reactivation lock inside settings.