In reply to Indy:
Its all Trumps fault. One big conspiracy to make Apple great again.
Back in the real world, I have a Google Pixel tablet. When I first got my tablet it would randomly shut down and re-boot. It just happened once or twice a day. A quick google search said that it was a fault with some Pixel tablets and the only way to fix the issue was to get a replacement.
So, I contacted Google and sure enough, with no arguments or attempts to wriggle google sent me a replacement tablet that day.
Since my replacement, I have never had an issue what so ever. I know that my tablet is android and not apple, but maybe you could contact apple for a replacement?
If apple get argumentative, you could check out the Consumer Rights act 2015.
http://www.which.co.uk/consumer-rights/regulation/consumer-rights-act