i have a s7 edge and i am seeing some dead pixel on edge of the screen, i want to know how to fix them

there is no brighness bar in notification panel, sometimes it disappears<script>LITHIUM.OoyalaPlayer.addVideo('https:\/\/player.ooyala.com\/static\/v4\/production\/', 'lia-vid-RiNms0aDE6mT6ZdTVFovqqzyC8683FXCw320h240r888', 'RiNms0aDE6mT6ZdTVFovqqzyC8...

oreo update finalllyyyyy

my s7 edge battery is rapidly draining, what should i do?

i got new update in s7 edge.