I am highly concerned of this problem of yours. You have made a big mistake of introducing bottle for feeding. It creates nipple confusion, and then makes child avoid breast milk and take bottle milk. So , this is earliest and right time to stop bottle feeding as soon as possible. Give breast feeding as much as possible every 2 hourly, if not taking then give expressed breast milk with Katori and spoon every 2 hourly thereafter. The best stimulation for increasing breast milk is making the baby suck the nipple as much as possible. You can consult your pediatrician
for further help. Thank you.