Yeah the compression ring you drop in gets pushed into the dust cover too deep. Take a block of wood with an old t shirt draped around and place it on top of your forks and give it a hit or two. The place the scooter on the ground and push on the dust cover it would separate from the compression ring and there you have it.
Iake a flat head screw driver and put it between the headset cup and the top can and slowly just pry it off, but dont just do it in one spot, go all the way around it.
I told you not to buy that headset, and now you know why.