The broadband hasn't worked for a couple of days in our apartment. Complicating matters is that it's rented out to guests at the moment, although we'll be there next week.
Although we're with Slingshot, we used to be with Vodafone, hence the Vodafone Station as the modem. However, it didn't seem fundamentally incompatible, working fine for months until now.
We've got the property manager to turn it on and off, try it in different jackpoints, and the finally a factory reset. Slingshot have done line tests and haven't detected any issues. She's also tried it with a second modem, which hasn't worked either (although it is also a similar Vodafone one).
According to Slingshot technical support, for the factory reset we also need the original username and password that we got when we first set up the modem? I have no idea how we'd find this, though. There doesn't seem to be a default username and password for the station (that works), either.