Samsung s6 factory rest

[silverdale]

I've an old Samsung S6 and I need to factory reset but it's not having any of it.
I've tried via settings but its asking for password for ancient Outlook account which I've not a clue.
When I try to reboot and press home/power/Vol up I let go of the power when I get the Samsung logo it just loads and boot up.
Is there any simpler way to wipe it totally rather than firmwares , just a simple wipe me clean

 

[sneaker]

I've just reflashed a samsung tab 3 using odin3 it was very simple to do once you find a good replacement backup rom to load.

edit, a quick search found plenty of firmware's take a read HERE