New Iphone 11 pro body defect

I just received my new iphone 11pro and it came with a bad quality regarding the stainless steel frame, there is a gap between it and the glass back you can feel it and see it, I purchased the phone from USA and received it in Egypt.

This is the 2nd one I got from the same model and the first was perfect.

I wanna exchange it and need to know what to do?