You say she doesn't feel satisfied after feeds?
The formula may have caused you to have low milk supply. That's really common; and retracting the formula is hard. As you reduce the formula you'll need to keep an eye on output (nappies) to check that baby is still getting enough input.
Another possibility is that actually you've got oversupply. Sometimes when a baby gets too much foremilk their tummy gets full and they are unsettled by wind, colicky refluxy symptoms, they grow well, but their poo is often green and liquid, their bottoms sore. Because they never get to the hind milk they seem constantly unsettled.
Do either of these ring any bells?
Melanie