Router not working at all

Oh well, it’s stopped working entirely now. I’ve taken one of the sims out and used another router to get here. I’ve reset the Spitz, it shows power and the 2g and 5g lights come on but that’s all. I can’t connect to it via the interface now and when connected to WiFi it’s just dead and I can’t connect to the interface.
Is there something I can do?

What were the last changes you did?

None. I was just trying to swap between 2 sims and it would not do it. I finally found auto swap and turned that off and the option to swap between them appeared. But by then there was no internet. I’ve reset it again and leaving it powered off for a while. Can’t be bothered with it right now tbh