OK, colic expert here lol!
Gripe water is best for colicy babies. Infacol is ok for wind (used this on ds who had occasional trapped wind), but IME does not work on colic. With gripe water you need to give the max dose (obv read the bottle). Use after every feed whether baby has pain then or not, this helps stop the build up. The woodwards one my dd couldn't tolerate but the boots own one she lapped up.
Lots of tummy time in the day, helps stretch babies muscles and is great at getting trapped wind up. Even if only for a few mins at a time it will help.
Colief is a miracle cure for some, it didn't work for me, but know others who it has worked for. Same with osteopathy, didn't help my dd, but know others it did.
Lots of diff winding positions, removing bottle and winding midway through really miffed my two off so didn't do that, but you could give a go. Try different bottles and teats as this can help but gets expensive.
Try a sling, some babies find this soothing and being upright a lot can help the wind situation. If you can borrow a swing too, they find that soothing.
I tried everything and tbh there is no miracle cure and its all trial and error but they DO grow out of it. After 12 weeks please see your gp as it could be reflux...my dd had colic until 4.5 months, and after 3 months they put her on gaviscon to see if that would help but it didn't. I feel for you ladies and your lovely babies, it so awful to see them in so much pain and not be able to help them.
Good luck x