2 months old and bf struggle

My baby is just a little over 2 months old, bf didn't go well at first we had troubles latching so she was given a bottle. Then about 5 days in I got her to latch. If we're only bf I'd have to feed about 3 times in an hour or feed for an hour straight and she'd still be hungry. I bf and then bottle feed. I can only pump about an ounce at one time. So my question is what can I do to either get more or get her to be able to suck out more multiple times during a feeding? I'd like to cut back on bottles...