Bringing up wind

Wish i could help but havent been in this situation. Hope others come on here soon with more insight then me!! Good Luck!

Laying him flat and massaging his tummy with your fingers in stroking movements; the "bicycle" (moving his legs); a combination of straight-upright then sitting (the stretching seems to "wiggle" it out of them); laying him face down on your arm, so that he's angled slightly, and rubbing/patting his back.

You poor thing, I know how you feel on this issue as I had the same problem with Alyssa for the first few months and the 'usual' burp positions didn't work for us either. One of the more successful burping positions we ended up using involved sitting her upright on one knee, with one hand pressed against the tummy while holding the chin up, and the other to pat the back.
Also, tummy time often helped.

Not sure if you're bf so this may not relate to you, but our problem related to my fast flow breastmilk and I found pinching the nipple to make less milk come out helped so she didn't take in so much air. Also, expressing a little of the foremilk to get to the thicker hind milk supposedly helps stop such severe wind as foremilk contains more lactose which can make them more windy.

A nice deep warm bath helped my friends baby with bringing up wind but didn't work for us.

Oh yeah, and we tried gripe water and Infacol but they didn't help. In fact, Infacol made her wind worse in our case even though I understand it works well for others.