Don't panic yet .
Helmets are not made mirrored and they can sit differently on both sides, gap on one side and not on the other.
From your photos it does look like your faceplate could come upwards and also forward at the chin. Also the trim line on the front of the cap does not look straight, may need a trim so the brow trim sits a little higher, will allow the faceplate to come upwards.
I would advise using magnets to hold everything in place, not clamps through the eyes as that will push pieces apart.
Remember if you have any gaps on the sides the ears will cover these.
I found referencing others builds to be a great help