Sorry to hear you're having problems! A screenshot would help me better understand the problem; you could link to one here, or else visit the Discord and upload one there. It's entirely possible there's a bug I missed.
My general hints about the puzzle are:
- You need to use all portals but the red one
- Most of the action takes place on the left hand set of platforms
- You'll need to do some backtracking
Assuming everything is working correctly, there's at least 2 ways to solve it; there may be more. Also, you can use "easy mode" to bypass it (use the torch in the first puzzle room), but in doing so you'll miss out on a reward (a neat accessory) and a little bit of dialogue.