Hiya!
You have just described exactly what happened with William. He was always a hungry baby and was colicy. When I went onto the hungry baby milk C&G2 like you have he got terrible stomach aches and the colic got far far worse.. it was such a mistake for me.
I as you probably know by now went onto Comfort by C&G and it was wonderful. He was quickly far more settled and his feeding patterns settled into 3 hourly and then 4 hourly whereas on normal formula he was crying for food after 2 hours.
If he has probs with the lactose in milks you could try colief which is brilliant.. its drops that you pop into the milk before feeding which breaks down the lactose and helps the babies to digest it. Its not cheap but you can get it on prescription.
H xx