Can't access fritz.box URL so can't use reset password link which has fritz.box in it's URL. : r/fritzbox
Hard Reset FRITZ! Box 7590, How To - HardReset.info
Where is the reset button on the FritzBox?
FRITZ WLAN 7360 Login Instructions
How to factory reset AVM FRITZ!Box 7590 router - Default Login & Password - How to Factory reset Your Router - Routers' Specifications, Manuals and Factory reset Information