You are amazing, thank you so much! It all worked apart from the last one, which said it needs an output file specified so added -o after a quick search. I really appreciate the quick response to, I got in very quickly but only just managed to respond here.

Do you physically have access to the router? If so, I would figure out the settings it uses that other people notice (wifi settings etc) and just hard reset it. Chances are they just use the basic settings provided anyway.

Is anybody else using the router or just you? If just you, I’d just do what you want to it and reset it when you leave.