CRANIAL OSTEOPATHY!!!! I hear your pain - ds was awful, from day 3 it started and got worse - bad nights he started screaming at 7pm and kept at it until 4/30 / 5am... With the odd 5mins off very occasionally.
The what we called 'sleeping tiger' hold helped a bit - basically they are tummy down on your arm with their head in your hand and legs and arms hanging down each side...
Infacol didn't touch it.
Colief definitely helped but didn't make it go away - and its a real faff if you are bf (but we did this despite faff because of how awful the colic was)
3 treatments of cranial osteopathy and it just stopped - no tailing off - just completely stopped.
I hope something works.