Feeding issue. I feed every two hours.

My baby one month old . Weight when born 2.86 kg. Current weight yet to check. Till now due to low milk, latch issue, ussd to give direct breast milk, pumped milk, formula. All equal time. I want to move to complete breast feeding and increase my milk supply. When i feed baby breast milk morning afternoon evening he's fine. He takes 20 minutes to sometimes more than hour to feed by sleeping or relatch etc. My problem is from past 3days during 8 pm feed he eats initially nicely. Sleeps between. After sometime he becomes aggresivewith breast. Biting nipple, and biting and twisting it till i pull out. Then cries, open mouth wide , looks more hungry, pushes me, again latch, again pushes, as if milk less. But wen i express milk there. If i change breast same case. Drinks sometime. Cries. I can see mik in mouth. Lot of hand and leg movement, opening mouth, like extreme hungrr. . During this time he passed urine twice. All this happen after 20 min feed.formula drinks.I feed every two hours.