screen protector doesn't fit to my iphone SE

I ordered iphone SE and screen protector for 7/8/SE together. The screen protector doesn't fit to my phone. It covers only screen without bezel, and it doesn't even perfectly cover the screen. I put it with the device came in the box, but still it has gap between the phone and the protector. I remember that even when I got helped to put this protector on at Apple store, the employee failed to fit it like three times so he opened three boxes to make it fitted. Is there any way I can get helped to put protector on in this quarantine time? I am very disappointed because it is $39 one which is more expensive than others. I really liked this protector before so I just ordered it together.

The protector itself literally doesn't fit to the phone. I was wondering if I can get another, right size one or get some help to put it on.