Quoted from Lermods:We use these dimmers in some of our mods. Make sure the dimmer is not wired backwards. You’ll see it says led on one end and 12-24v on the other end. The led side of the dimmer should be on the side running to the topper, 12-24v should be on the side going to the game’s power connection. If it’s wired backwards, the light will just stay on a dimmer won’t function.
Just as an update, I went ahead and cut the wire and turned it around, and it is working fine now. It doesn't change color (but I am guessing it's just a straight red led strip), but the effects are working now. Thanks for the help.
I am a bit disappointed in laseriffic / cointaker for not even getting a response. I like to judge people on their best day, not their worst, but since this is my first experience with them, I probably won't ever buy anything from them again.
Guinnesstime you may never get a response or a new controller, but just try reversing flipping it around, and hopefully that solves it.