Low Supply while Exclusively Pumping

My baby never latched and I started producing after one week of giving birth. During that time, my baby was given formula milk. When I started producing, my baby had gotten so used to the bottle that he refused to put in the effort and latch.

I ended up pumping. BUT, my supply is very low. The first pumping session of the day gives one ounce (both sides combined). And all other sessions produce less than one.

I drink 6 glasses of water/milk a day on average.

My baby gets whatever i produce and is supplemented with formula.

Mama’s who pump, how do you increase your supply?

Help a mama out!