Refurbished or New iPhone 6s?

I pre-ordered the Apple iPhone 6s (Silver, 64GB) once it was available for pre-order in the Netherlands, start of October 2015. In March 2016, the iPhone just turned off and did not show any sign of life, it was gone. It wasn't because of any damage I did to it, but because of an internal defect (most likely hardware). KPN, my provider, took the iPhone 6s and sent it to Apple in the United States of America (KPN gave me an iPhone 4 with only 8GB as a temporary replacement).

After 2 weeks, I went to KPN to get my 'new' iPhone 6s, which they handed over to me. I received the iPhone in a small cardboard box with no actual text on it like it says on the original iPhone 6s boxes. And of course there were no accessories in the box, as I still had the original ones.

When I got home, I immediately pulled out the iPhone (with care, duh) and put on a silicone case and tempered glass screen. After a few days, I noticed some pixels in the top left corner have a slightly different color. This is only visible when bright colors (white, yellow, 'cream') show up on the display. I don't really worry about the display. I do worry, however, about it being a new or refurbished iPhone 6s.

Also, what can I do if it is a refurbished iPhone 6s (I'm not OK with that)? What can I do about the tiny pixel defects in the top left corner of the display, will Apple cover the costs if I'm deciding to repair it?

I have made a screenshot of my Service and Support Coverage, which Apple's website based on my serial number. The digits of my serial number have been left unblurred for you to find any information that might help you to help me out. 🙂