Hiya
So sorry to hear that you LO is suffering.
Just a few thoughts - when you tried infacol how long did you persevere with it? Did you use it for every feed?? Just that it gets more effective the more you use it and after a short while I found it invaluable for my windy little man.
Also which bottles are you using? Do you use anti colic bottles? I use Dr Browns / B-free bottles which are absolutely wonderful for cutting down the gas... may be worth buying a pair from Boots (about £12 though) to see if they help. I got all mine 2nd hand from ebay much cheaper.
Thirdly be careful with keep altering babies formula - it takes their little systems a while to get used to new ones. I have had Will on Omneo Comfort. Yes it did cause more wind and odd bowel habits while it was settling in but once Will was used to it he was a changed baby.. hardly any wind, no consitpation etc etc.
Lastly have you tried Colief?? You can get it from the chemist at £10 but the Dr will give it you free on prescription. It breaks down all of the lactose in the milk which early on can be difficult for babies to digest, and I found it fantastic for William.
Sorry to have waffled on - I had a very windy little boy and via the methods above he was transformed. No two LOs are the same though so just hope my thoughts might help you. Im afraid I havent had any experience with reflux to help on that score.
Take care
Helen