Low supply mum

Hi, I am a low supply mum of a 3 weeks old baby (combined output of around 30ml after 25 mins of pumping). Have been fully pumping every 3 hourly as baby does not want to latch since birth and baby has jaundice so I supplement with formula to ensure he has enough fluid intake. Any ideas how to increase my supply? Been taking fenugreek capsules and also lactation cookies but nothing seem to help with the supply. Also power pump once a day.