Oh Nic.. I'm so sorry!
Ella was awake from 8pm to 11pm and we are scratching our heads too . I basically fed for 2 hours straight, but that didnt help at all.
I guess you have tried a bath?
How about trying to keep bubs awake after each feed during the day and feeding more often
Then just not waking at night?
Sunshine also helps establish day/night.
I'm so sorry and I hope something works fast for you!!!!