Daughter has cows milk protein allergy

OK so I tried her on Similac Alimentum and she will not drink it she will not drink The other well-known brand either so I did some research on Amazon and came across these two I was wondering if they are safe as a replacement I do breast-feed but I am not producing enough milk and baby is always hungry I tried the good start plant-based protein lactose-free and she drank the whole bottle and loved it would not do that with the Alimentum I have not tried the Gerber start extensive HA yet but would like opinions from any mothers that are using these products and which one is best with cows milk protein allergy