GaribaldiGirl DD was also miserable on day 5. Not helped by a midnight fire alarm and lack of sleep. It's horrid when they are sad and you can't be there
.
For what it's worth, she's doing better now lectures have started and there's a bit more structure. Also some of the really overwhelming "to do" list is behind her and things are getting a bit more routine.
On a really practical level, does your daughter have a network point in her room - and if so, would an ethernet cable help with the dodgy WiFi? DD is also not really connecting with people in her household, but is making connections through clubs. But a reliable internet connection definitely helps with that at the moment!