iPhone 6s plus died after fall

My iphone 6S plus ended up in my little brothers's pillow case and when I picked the pillow case up and when the pillow fell back down the iphone hit the rail on the bed. After a little while it was still working fine, then all of a sudden it starting glitching. I tried restarting it but that didn't work. Then it got worse and eventually blacked out, made noise for a little bit, and then never came back on. Now I don't know what to do because my phone wasn't bought by my mother and doesn't have a protection plan.

[Re-Titled by Moderator]